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Geometric Topology Seminar
online via Zoom, Moscow

Topology studies properties that are invariant under homeomorphism and its standard variations (diffeomorphism, piecewise linear homeomorphism, homeomorphism of pairs, fiberwise homeomorphism, etc.) Geometric topology confines its attention to spaces that are accessible to geometric intuition (for example, subsets of Euclidean spaces $\mathbb{R}^n$) and proceeds from elementary questions that have intuitive geometric meaning. Yet methods used to solve these questions can be far from elementary and can dive deeply into other fields (algebraic topology, group theory, algebraic K-theory, general topology, metric geometry, representation theory, functional analysis, etc.)

As an illustration, here are five old unsolved problems of geometric topology with short statements.

• Schoenflies Problem: Can the 3-sphere be piecewise linearly (or smoothly) knotted in $\mathbb{R}^4$?
• Rolfsen's Problem: Is every knot (=embedding of a circle in $\mathbb{R}^3$) isotopic (=homotopic through knots) to the trivial knot?
• Fenn's Problem: Does every 2-dimensional contractible finite simplicial complex piecewise linearly embed in $\mathbb{R}^4$?
• Borsuk's Problem: Does every $n$-dimensional contractible, locally contractible compact metric space embed in $\mathbb{R}^{2n}$?
• Hilbert–Smith Problem: Does there exist a free action of the group of $p$-adic integers on a manifold?

Financial support. The seminar is supported by the Ministry of Science and Higher Education of the Russian Federation (the grant to the Steklov International Mathematical Center, Agreement no. 075-15-2019-1614).

Seminar organizers
Melikhov Sergey Aleksandrovich
Shchepin Evgeny Vital'evich

 Geometric Topology Seminar, Moscow April 23, 2021 (Fri) 1. String Topology and Homotopy Skein ModulesUwe KaiserApril 23, 2021 17:00, Moscow, Zoom April 16, 2021 (Fri) 2. A combinatorial view of Heegard–Floer link homology and relation with Conway function (continued)D. I. GubarevichApril 16, 2021 17:00, Moscow, Zoom April 9, 2021 (Fri) 3. A combinatorial view of Heegard–Floer link homology and relation with Conway functionD. I. GubarevichApril 9, 2021 17:00, Moscow, Zoom March 19, 2021 (Fri) 4. $M_5$ è $M_3$-invariants for oriented linksP. M. Akhmet'evMarch 19, 2021 17:00, Moscow, Zoom March 12, 2021 (Fri) 5. Enumeration of equivalence classes of finite-sheeted coverings of the Hantzsche–Wendt manifoldG. R. ChelnokovMarch 12, 2021 17:00, Moscow, Zoom March 5, 2021 (Fri) 6. Trisections of $4$-manifolds and Cornea's ConjectureR. R. SadykovMarch 5, 2021 18:00, Moscow, Zoom February 26, 2021 (Fri) 7. A formula for the $M_3$-invariant of oriented linksP. M. Akhmet'evFebruary 26, 2021 17:00, Moscow, Zoom February 12, 2021 (Fri) 8. Embeddability of join of two simplicial complexesSalman ParsaFebruary 12, 2021 17:00, Moscow, Zoom February 5, 2021 (Fri) 9. Towards classifying embeddings of $n$-manifolds with boundary in the $(2n-1)$-spaceM. S. FedorovFebruary 5, 2021 17:00, Moscow, Zoom January 22, 2021 (Fri) 10. Handle sliding in the setting of Morse functionsM. S. TemkinJanuary 22, 2021 17:00, Moscow, Zoom January 15, 2021 (Fri) 11. Combinatorics of Morse functions on the $2$-dimensional torusE. A. KudryavtsevaJanuary 15, 2021 17:00, Moscow, Zoom December 26, 2020 (Sat) 12. Enhanced Bruhat decomposition in strong Morse theoryM. S. TemkinDecember 26, 2020 17:00, Moscow, Zoom December 18, 2020 (Fri) 13. Some characterizations of CAT(0) cubical complexes (continued)A. A. GorelovDecember 18, 2020 17:00, Moscow, Zoom December 11, 2020 (Fri) 14. Some characterizations of CAT(0) cubical complexesA. A. GorelovDecember 11, 2020 17:00, Moscow, Zoom December 4, 2020 (Fri) 15. The Gassner invariant and the Alexander polynomial for string links (continued)M. S. TemkinDecember 4, 2020 17:00, Moscow, Zoom November 27, 2020 (Fri) 16. The Gassner invariant and the Alexander polynomial for string linksM. S. TemkinNovember 27, 2020 17:00, Moscow, Zoom November 20, 2020 (Fri) 17. All projections of a generic Cantor set are Cantor setsO. D. FrolkinaNovember 20, 2020 17:00, Moscow, Zoom November 13, 2020 (Fri) 18. Equivariant maps, envy-free division and almost embeddingsR. N. KarasevNovember 13, 2020 17:00, Moscow, Zoom November 6, 2020 (Fri) 19. The Gassner representation for string links (continued)D. V. ZaytsevNovember 6, 2020 17:00, Moscow, Zoom October 30, 2020 (Fri) 20. The Gassner representation for string linksD. V. ZaytsevOctober 30, 2020 12:00, Moscow, Zoom October 9, 2020 (Fri) 21. Cantor sets with higher-dimensional projections and their non-genericityO. D. FrolkinaOctober 9, 2020 17:00, Moscow, Zoom October 2, 2020 (Fri) 22. Cantor sets with higher-dimensional projectionsO. D. FrolkinaOctober 2, 2020 17:00, Moscow, Zoom, ID: 984 4246 1141 September 25, 2020 (Fri) 23. Kolmogorov homologyE. V. ShchepinSeptember 25, 2020 17:00, Moscow, Steklov Math Institute (8 Gubkina st.), Room 223 + Zoom September 18, 2020 (Fri) 24. Orbit spaces for torus actions of complexity oneA. A. AyzenbergSeptember 18, 2020 17:00, Moscow, Zoom, ID: 984 4246 1141 September 11, 2020 (Fri) 25. A geometric proof and a strengthening of the easy part of the Adams' theorem on the Hopf invariantP. M. Akhmet'evSeptember 11, 2020 17:00, Moscow, Steklov Math Institute (8 Gubkina st.), room 534 + Zoom September 4, 2020 (Fri) 26. On the Borsuk–Ulam TheoremE. V. ShchepinSeptember 4, 2020 17:00, Moscow, Steklov Math Institute (8 Gubkina st.), room 534 + Zoom July 6, 2020 (Mon) 27. On actions of $p$-adic integers on one-dimensional compacta (continued)E. V. ShchepinJuly 6, 2020 17:00, Moscow, Zoom, ID: 873 3024 2661 July 2, 2020 (Thu) 28. Jordan property of automorphism groups of Hopf manifoldsA. O. SavelyevaJuly 2, 2020 17:00, Moscow, Zoom, ID: 873 3024 2661 June 29, 2020 (Mon) 29. On actions of $p$-adic integers on one-dimensional compactaE. V. ShchepinJune 29, 2020 17:00, Moscow, Zoom, ID: 873 3024 2661 June 25, 2020 (Thu) 30. Homological dimension theory (continued)E. V. ShchepinJune 25, 2020 17:00, Moscow, Zoom, ID: 873 3024 2661 June 21, 2020 (Sun) 31. Homological dimension theoryE. V. ShchepinJune 21, 2020 17:00, Moscow, Zoom, ID: 873 3024 2661 June 13, 2020 (Sat) 32. On $p$-adic actions on compactaE. V. ShchepinJune 13, 2020 17:00, Moscow, Zoom, ID: 873 3024 2661 June 10, 2020 (Wed) 33. The Lyashko-Looijenga covering and the geometry of Stokes setsN. ArtemovJune 10, 2020 17:00, Moscow, Zoom, ID: 873 3024 2661 June 3, 2020 (Wed) 34. Invariants of knots and integral geometryA. ZakharovJune 3, 2020 17:00, Moscow, Zoom, ID: 873 3024 2661 May 27, 2020 (Wed) 35. Alexander module for 2-component linksM. CabriaMay 27, 2020 17:00, Moscow, Zoom, ID: 873 3024 2661 May 23, 2020 (Sat) 36. On universality theorems for oriented matroids and polytopesD. A. MamaevMay 23, 2020 17:00, Moscow, Zoom, ID: 873 3024 2661 May 13, 2020 (Wed) 37. Collapsing and free deformation retractionA. A. GorelovMay 13, 2020 17:00, Moscow, Zoom, ID: 881 0442 9547 March 4, 2020 (Wed) 38. Mappings of 3-manifolds with prescribed Boardman singularitiesA. D. RyabichevMarch 4, 2020 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 210 February 26, 2020 (Wed) 39. Conic resolutions and cohomology of spaces of nonsingular degree $d$ hypersurfaces in $\mathbb CP^n$M. DolgikhFebruary 26, 2020 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 210 February 19, 2020 (Wed) 40. Invariants of abelian coversD. N. TereshkinFebruary 19, 2020 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 210 February 12, 2020 (Wed) 41. Introduction to the Alexander moduleM. CabriaFebruary 12, 2020 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 210 February 5, 2020 (Wed) 42. Conic resolutions and cohomology of spaces of nonsingular degree $d$ hypersurfaces in $\mathbb{C}P^n$M. DolgikhFebruary 5, 2020 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 210 January 22, 2020 (Wed) 43. On minimally expansive planar Peano curvesE. V. ShchepinJanuary 22, 2020 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 210 December 25, 2019 (Wed) 44. Immersion theory and Rokhlin's theoremR. KrutowskiDecember 25, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 211 December 18, 2019 (Wed) 45. Invariants of winding numbers in dynamics of flux lines and its visualizationP. M. Akhmet'evDecember 18, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 211 December 11, 2019 (Wed) 46. Median spaces and convex structuresA. A. GorelovDecember 11, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 211 December 4, 2019 (Wed) 47. The tight span and trimming of metric spacesA. O. VakhrinaDecember 4, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 211 November 20, 2019 (Wed) 48. Ìîäàëüíàÿ ëîãèêà, òîïîëîãèÿ è ñèìïëèöèàëüíûå ìíîæåñòâàV. B. ShehtmanNovember 20, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 211 November 13, 2019 (Wed) 49. Modal logic, topology and simplicial setsV. B. ShehtmanNovember 13, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 211 November 6, 2019 (Wed) 50. Distinguishing Legendrian and transverse knotsI. A. DynnikovNovember 6, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 211 October 30, 2019 (Wed) 51. The theory of Frobenius $n$-homomorphisms and the $gt_n$-formulaD. V. GugninOctober 30, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 211 October 23, 2019 (Wed) 52. Lower bounds for the degree of ramified coverings of manifolds: the method of the $gt_n$-formulaD. V. GugninOctober 23, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 211 October 16, 2019 (Wed) 53. Injective metric and cubical collapsingS. A. MelikhovOctober 16, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 211 October 9, 2019 (Wed) 54. Cubical collapsing and injective metricS. A. MelikhovOctober 9, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 211 September 25, 2019 (Wed) 55. Real Hurwitz numbersA. M. DunaykinSeptember 25, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 211 September 18, 2019 (Wed) 56. Degree of maps between spheres in fair division problemsR. N. KarasevSeptember 18, 2019 17:15, Moscow, Math Department of the HSE (Usachyova, 6), room 211 September 11, 2019 (Wed) 57. Is every knot isotopic to the unknot?S. A. MelikhovSeptember 11, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 211 September 4, 2019 (Wed) 58. On a new variation of the Arf-invariant, describing a generator of the 2-component of the stable homotopy group of spheres $\Pi_7$P. M. Akhmet'evSeptember 4, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 211 June 28, 2019 (Fri) 59. Causality and Legendrian linking in higher dimensional and causally simple spacetimesV. V. ChernovJune 28, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 212 June 21, 2019 (Fri) 60. Rational homotopy type of spaces of higher-dimensional knots and linksV. É. TurchinJune 21, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 212 May 21, 2019 (Tue) 61. On topological complexityR. R. SadykovMay 21, 2019 11:00, Moscow, Steklov Math Institute (8 Gubkina st.), room 534 62. Mappings of 3-manifolds with prescribed Thom–Boardman singularitiesA. D. RyabichevMay 21, 2019 13:30, Moscow, Steklov Math Institute (8 Gubkina st.), room 534 63. Brunnian link maps in the 4-sphere and Goussarov-Habiro moves on links in the 3-sphereS. A. MelikhovMay 21, 2019 16:00, Moscow, Steklov Math Institute (8 Gubkina st.), room 534 May 17, 2019 (Fri) 64. Gabai's light bulb theoremR. R. SadykovMay 17, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 212 April 26, 2019 (Fri) 65. Characteristic classes of triangulated manifolds: Euler classG. I. SharyginApril 26, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 212 April 19, 2019 (Fri) 66. Polynomial functors and their applicationD. N. TereshkinApril 19, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 212 April 12, 2019 (Fri) 67. Mappings of 3-manifolds with prescribed Thom–Boardman singularitiesA. D. RyabichevApril 12, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 212 April 5, 2019 (Fri) 68. Color homology, hexagon cohomology and simplicial cohomologyI. G. KorepanovApril 5, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 212 March 29, 2019 (Fri) 69. Theorems on intersection and linkingA. B. SkopenkovMarch 29, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 212 March 22, 2019 (Fri) 70. Fair partition of a two-dimensional convex pieR. N. KarasevMarch 22, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 212 March 15, 2019 (Fri) 71. Leibniz differentialE. V. ShchepinMarch 15, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 212 February 8, 2019 (Fri) 72. Eliashberg's h-principle for maps with Thom-Boardman singularities – IIA. D. RyabichevFebruary 8, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 212 February 1, 2019 (Fri) 73. Eliashberg's h-principle for maps with Thom-Boardman singularitiesA. D. RyabichevFebruary 1, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 212 January 25, 2019 (Fri) 74. Asymptotic invariants of linksP. M. Akhmet'evJanuary 25, 2019 17:00, Moscow, Math Department of the HSE (Usachyova, 6), room 212 January 18, 2019 (Fri) 75. [Classification of knotted tori]A. B. SkopenkovJanuary 18, 2019 18:30, Moscow, Math Department of the HSE (Usachyova, 6), room 212 December 17, 2018 (Mon) 76. Brunnian link maps in the 4-sphere and the Chinese Rings puzzleS. A. MelikhovDecember 17, 2018 15:30, Moscow, Math Department of the HSE (Usachyova, 6), room 212 October 15, 2018 (Mon) 77. Spaces of isospectral Hermitian matrices having zeroes at prescribed positionsA. A. AyzenbergOctober 15, 2018 15:30, Moscow, Math Department of the HSE (Usachyova, 6), room 212 October 1, 2018 (Mon) 78. Corrected derived limits, or How to expel set theory from algebraic topology (part II)S. A. MelikhovOctober 1, 2018 15:30, Moscow, Math Department of the HSE (Usachyova, 6), room 212 September 24, 2018 (Mon) 79. Corrected derived limits, or How to expel set theory from algebraic topologyS. A. MelikhovSeptember 24, 2018 15:30, Moscow, Math Department of the HSE (Usachyova, 6), room 212 June 7, 2018 (Thu) 80. Classification of PL-structures on a homotopy type by K-theoryI. YakovlevJune 7, 2018 14:00, Moscow, Math Department of the Higher School of Economics, Room 108 May 17, 2018 (Thu) 81. Invariants on Hopf algebra of delta-matroids and Hopf algebra of Lagrangian subspaces that satisfy four-term relationsV. I. ZhukovMay 17, 2018 14:00, Moscow, Math Department of the Higher School of Economics, Room 108 May 10, 2018 (Thu) 82. Matroids and delta-matroids of graphs and embedded graphs, IIA. M. DunaykinMay 10, 2018 14:00, Moscow, Math Department of the Higher School of Economics, Room 108 April 26, 2018 (Thu) 83. Matroids and delta-matroids of graphs and embedded graphsA. M. DunaykinApril 26, 2018 14:00, Moscow, Math Department of the Higher School of Economics, Room 108 April 19, 2018 (Thu) 84. Hexagon relations, their cohomologies, and invariants of 4-dimensional PL manifoldsN. M. SadykovApril 19, 2018 14:00, Moscow, Math Department of the Higher School of Economics, Room 108 April 12, 2018 (Thu) 85. Limit of colimits versus colimit of limits IIS. A. MelikhovApril 12, 2018 14:00, Moscow, Math Department of the Higher School of Economics, Room 108 April 5, 2018 (Thu) 86. Limit of colimits versus colimit of limitsS. A. MelikhovApril 5, 2018 14:00, Moscow, Math Department of the Higher School of Economics, Room 108 March 22, 2018 (Thu) 87. Î êðèâûõ ÏåàíîE. V. ShchepinMarch 22, 2018 14:00, Moscow, Math Department of the Higher School of Economics, Room 108 March 15, 2018 (Thu) 88. An unlinking theorem for link maps in the 4-sphereA. C. LightfootMarch 15, 2018 14:00, Moscow, Math Department of the Higher School of Economics, Room 108 March 1, 2018 (Thu) 89. Introduction to Kirby diagrams of four-manifoldsA. C. LightfootMarch 1, 2018 14:00, Moscow, Math Department of the Higher School of Economics, Room 108 February 22, 2018 (Thu) 90. Classifying link maps in the four-sphere (II)A. C. LightfootFebruary 22, 2018 14:00, Moscow, Math Department of the Higher School of Economics, Room 108 February 15, 2018 (Thu) 91. Classifying link maps in the four-sphereA. C. LightfootFebruary 15, 2018 14:00, Moscow, Math Department of the Higher School of Economics, Room 215 December 14, 2017 (Thu) 92. Birman-Craggs and Johnson homomorphismsB. UsovDecember 14, 2017 14:00, Moscow, Math Department of the Higher School of Economics (Usachyova, 6), Room 209 December 7, 2017 (Thu) 93. The Volume Conjecture and the Chern-Simons TheoryI. YakovlevDecember 7, 2017 14:00, Moscow, Math Department of the Higher School of Economics (Usachyova, 6), Room 209 November 30, 2017 (Thu) 94. Milnor invariants, Orr invariants and slicing obstructions IID. N. TereshkinNovember 30, 2017 14:00, Moscow, Math Department of the Higher School of Economics (Usachyova, 6), Room 209 November 23, 2017 (Thu) 95. Milnor invariants, Orr invariants and slicing obstructionsD. N. TereshkinNovember 23, 2017 14:00, Moscow, Math Department of the Higher School of Economics (Usachyova, 6), Room 209 November 16, 2017 (Thu) 96. Barannikov's approach to Morse theory on manifolds with boundaryM. S. TemkinNovember 16, 2017 14:00, Moscow, Math Department of the Higher School of Economics (Usachyova, 6), Room 209 November 9, 2017 (Thu) 97. Applications of 2-braids via chart diagramsA. C. LightfootNovember 9, 2017 14:00, Moscow, Math Department of the Higher School of Economics (Usachyova, 6), Room 209 November 2, 2017 (Thu) 98. Conservation of energy in lattice field theoriesM. B. SkopenkovNovember 2, 2017 14:00, Moscow, Math Department of the Higher School of Economics (Usachyova, 6), Room 209 October 26, 2017 (Thu) 99. Projected embeddingsS. A. MelikhovOctober 26, 2017 14:00, Moscow, Math Department of the Higher School of Economics (Usachyova, 6), Room 209 October 19, 2017 (Thu) 100. Manifolds defined by right-angled 3-dimensional polytopesT. E. PanovOctober 19, 2017 14:00, Moscow, Math Department of the Higher School of Economics (Usachyova, 6), Room 209 October 12, 2017 (Thu) 101. Rectangular diagrams of knots and a 'brute force' method to distinguish Legendrian knotsI. A. DynnikovOctober 12, 2017 14:00, Moscow, Math Department of the Higher School of Economics (Usachyova, 6), Room 209 October 5, 2017 (Thu) 102. Weighted transition polynomial as a weight systemA. M. DunaykinOctober 5, 2017 14:00, Moscow, Math Department of the Higher School of Economics (Usachyova, 6), Room 209 September 21, 2017 (Thu) 103. Quadratic Helicity in MHDP. M. Akhmet'evSeptember 21, 2017 14:00, Moscow, Math Department of the Higher School of Economics (Usachyova, 6), Room 108 September 7, 2017 (Thu) 104. Milnor's link-homotopy invariants for handlebody-linksYuka KotoriiSeptember 7, 2017 14:00, Moscow, Math Department of the Higher School of Economics (Usachyova, 6), Room 108 August 31, 2017 (Thu) 105. On $\Delta$-link homotopyYuka Kotorii, S. A. MelikhovAugust 31, 2017 17:00, Moscow, Math Department of the Higher School of Economics (Usachyova, 6), Room 108 August 10, 2017 (Thu) 106. Òîíêèé øåéï è òåîðåìû åäèíñòâåííîñòè äëÿ ãîìîëîãèé è êîãîìîëîãèé ïîëüñêîãî ïðîñòðàíñòâàS. A. MelikhovAugust 10, 2017 14:00, Moscow, Steklov Mathematical Institute, room 534 August 3, 2017 (Thu) 107. A combinatorial formula for M-invariantP. M. Akhmet'evAugust 3, 2017 14:00, Moscow, Steklov Mathematical Institute, room 534 July 20, 2017 (Thu) 108. $\Delta$-link homotopy of links in $S^3$ and invariants of link maps in $S^4$S. A. MelikhovJuly 20, 2017 15:00, Moscow, Steklov Mathematical Institute, room 534 March 23, 2017 (Thu) 109. Eliminating higher-multiplicity intersections in the metastable dimension rangeA. B. SkopenkovMarch 23, 2017 14:00, Moscow, Steklov Mathematical Institute, room 534 February 2, 2017 (Thu) 110. The triviality of a certain secondary invariant of link homotopy in dimension 4Ashley LightfootFebruary 2, 2017 14:00, Moscow, Steklov Mathematical Institute, room 534 September 28, 2016 (Wed) 111. Ðåãóëÿðíàÿ ãîìîòîïíîñòü ïîãðóæåíèé ãðàôîâ â ïîâåðõíîñòüD. A. PermyakovSeptember 28, 2016 15:00, Moscow, Lomonosov Moscow State University, Mech.-math. Dept. 1324 September 2, 2016 (Fri) 112. Minimizing intersection points of loops on a surface and the Andersen-Mattes-Reshetikhin Poisson bracketV. V. ChernovSeptember 2, 2016 13:00, Moscow, Steklov Mathematical Institute, room 534 April 7, 2016 (Thu) 113. Î ñòÿãèâàåìûõ îêðåñòíîñòÿõ â ãðóïïå ãîìåîìîðôèçìîâ ìíîãîîáðàçèÿA. V. ChernavskiiApril 7, 2016 14:30, Moscow, Steklov Mathematical Institute, room 534 March 26, 2015 (Thu) 114. Ïðîñòðàíñòâî íàáîðîâ ðàçëè÷íûõ òî÷åê è êîíòðïðèìåð ê òîïîëîãè÷åñêîé ïðîáëåìå ÒâåðáåðãàA. B. SkopenkovMarch 26, 2015 11:00, Moscow, Steklov Mathematical Institute, room 534 February 19, 2015 (Thu) 115. Ðåãóëÿðíàÿ ãîìîòîïíîñòü ïîãðóæåíèé ãðàôîâ â ïîâåðõíîñòüD. A. PermyakovFebruary 19, 2015 11:00, Moscow, Steklov Mathematical Institute, room 534 January 8, 2015 (Thu) 116. Òåîðåìà Ãðîìîâà î ñèìïëåêòè÷åñêîé íåñæèìàåìîñòèD. I. TonkonogJanuary 8, 2015 11:00, Moscow, IUM, room 303 November 13, 2014 (Thu) 117. Ïðîáëåìà Âåñòà îá ýêñïîíåíòå ãðóïïû Ëè è óíèâåðñàëüíûå G-ïðîñòðàíñòâà ÏàëåS. M. AgeevNovember 13, 2014 11:00, Moscow, Steklov Mathematical Institute, room 534 October 2, 2014 (Thu) 118. Îá èçîòîïè÷åñêîé êëàññèôèêàöèè çàöåïëåíèé èç òðåõìåðíîé ñôåðû S3 è òðåõìåðíîãî òîðà S1xS2 â øåñòèìåðíîì ïðîñòðàíñòâåS. N. AvvakumovOctober 2, 2014 11:00, Moscow, Steklov Mathematical Institute, room 534 September 30, 2014 (Tue) 119. On knots transverse to a vector fieldV. V. ChernovSeptember 30, 2014 15:00, Moscow, Lomonosov Moscow State University, Mech.-math. Dept. 12-26 September 16, 2014 (Tue) 120. Âëîæåíèÿ ïðîêîëîòûõ n-ìíîãîîáðàçèé â (2n-1)-ìåðíîå ïðîñòðàíñòâîD. I. TonkonogSeptember 16, 2014 15:00, Moscow, Lomonosov Moscow State University, Mech.-math. Dept. 1226 September 11, 2014 (Thu) 121. Classification of Knotted toriA. B. SkopenkovSeptember 11, 2014 11:00, Moscow, Steklov Mathematical Institute, room 534 December 27, 2013 (Fri) 122. Òåîðåìà Ìàäñåíà-ÂàéñàR. R. SadykovDecember 27, 2013 15:00, Moscow, Steklov Mathematical Institute, room 534 December 10, 2013 (Tue) 123. Î äâóìåðíîì êëåòî÷íî-ïîäîáíîì êîíòèóóìå ÏåàíîU. H. KarimovDecember 10, 2013 15:00, Moscow, Lomonosov Moscow State University, Mech.-math. Dept. 1224 November 5, 2013 (Tue) 124. Î ïðîñòðàíñòâå ëîêàëüíî ïëîñêèõ âëîæåíèé ìíîãîîáðàçèéA. V. ChernavskiiNovember 5, 2013 15:00, Moscow, Lomonosov Moscow State University, Mech.-math. Dept. 1208 October 22, 2013 (Tue) 125. A problem of Kolmogorov, and sheavesS. A. MelikhovOctober 22, 2013 15:00, Moscow, Lomonosov Moscow State University, Mech.-math. Dept. 12-08 October 10, 2013 (Thu) 126. Universal spaces in the sense of PalaisS. M. AgeevOctober 10, 2013 14:00, Moscow, Steklov Mathematical Institute, Room 534 (8 Gubkina st.) December 21, 2012 (Fri) 127. Theorems on homological stability of groupsR. R. SadykovDecember 21, 2012 16:00, Moscow, Steklov Mathematical Institute, room 534 August 8, 2012 (Wed) 128. Cosmic censorship of smooth structures and integer valued metrics on spacetimesV. V. ChernovAugust 8, 2012 12:00, Moscow, Steklov Mathematical Institute, room 534 129. Quantum invariants of virtual knots, reductive relations, and graphsV. O. ManturovAugust 8, 2012 14:05, Moscow, Steklov Mathematical Institute, room 534 August 3, 2012 (Fri) 130. Higher Franz-Reidemeister torsions and analytic torsions, after Igusa and GetteG. I. SharyginAugust 3, 2012 12:00, Moscow, Steklov Mathematical Institute, room 534 131. Topology and stratification of spaces of smooth functions with prescribed singularities on surfacesE. A. KudryavtsevaAugust 3, 2012 14:00, Moscow, Steklov Mathematical Institute, room 534 June 14, 2012 (Thu) 132. On non-immersibility of $RP^{10}$ to $R^{15}$P. M. Akhmet'ev, O. D. FrolkinaJune 14, 2012 14:30, Moscow, Steklov Mathematical Institute, room 534 April 17, 2012 (Tue) 133. Combinatorics of collapsible polyhedra and mapsS. A. MelikhovApril 17, 2012 15:00, Moscow, Lomonosov Moscow State University, Mech.-math. Dept. 12-06 April 6, 2012 (Fri) 134. Higher Reidemeister torsion (after K. Igusa et al.)G. I. SharyginApril 6, 2012 18:15, Moscow, Lomonosov Moscow State University, Mech.-math. Dept. 1212 December 6, 2011 (Tue) 135. Combinatorial piecewise-linear Steenrod bundles and fragmentation of a fiberwise homeomorphismN. E. MnevDecember 6, 2011 15:00, Moscow, Lomonosov Moscow State University, Mech.-math. Dept., 2nd GUM Building, Room 409 November 18, 2011 (Fri) 136. Existence of universal Groebner bases - topological proofD. A. StepanovNovember 18, 2011 17:00, Moscow, Steklov Mathematical Institute, room 534 November 1, 2011 (Tue) 137. On geometry of the index $8$ subgroup of the third stable stemS. A. MelikhovNovember 1, 2011 15:30, Moscow, Lomonosov Moscow State University, Mech.-math. Dept. 1206 October 25, 2011 (Tue) 138. Characteristic classes of combinatorial objects: twisting cochain and Igusa's constructionsG. I. SharyginOctober 25, 2011 15:00, Moscow, Lomonosov Moscow State University, Mech.-math. Dept. 1206 July 25, 2011 (Mon) 139. Twisting cochain and characteristic classes of combinatorial objectsG. I. SharyginJuly 25, 2011 12:00, Moscow, Steklov Mathematical Institute, room 534 July 21, 2011 (Thu) 140. Uniform polyhedraS. A. MelikhovJuly 21, 2011 14:30, Moscow, Steklov Mathematical Institute, room 534 June 15, 2011 (Wed) 141. Calculus of functors on manifoldsV. É. TurchinJune 15, 2011 16:00, Moscow, Steklov Mathematical Institute, room 534 142. Uniform polyhedraS. A. MelikhovJune 15, 2011 18:00, Moscow, Steklov Mathematical Institute, room 534 May 31, 2011 (Tue) 143. Homotopy type of the space of Morse functions on surfaces. Part 2 (Complexes of Morse functions; examples; idea of proof; a description of the cohomology ring)E. A. KudryavtsevaMay 31, 2011 15:00, Moscow, Lomonosov Moscow State University, Mech.-math. Dept. 12-07 (13-24) May 24, 2011 (Tue) 144. Homotopy type of the space of Morse functions on surfacesE. A. KudryavtsevaMay 24, 2011 15:00, Moscow, Lomonosov Moscow State University, Mech.-math. Dept. 12-07 (13-24) May 3, 2011 (Tue) 145. On the problem of delooping of knot spacesV. É. TurchinMay 3, 2011 15:00, Moscow, Lomonosov Moscow State University, Mech.-math. Dept. 12-07 April 19, 2011 (Tue) 146. The combinatorial viewpoint in algebraic K-theory of spacesS. A. MelikhovApril 19, 2011 15:00, Moscow, Lomonosov Moscow State University, Mech.-math. Dept. 12-07 March 1, 2011 (Tue) 147. În a proof of Shtan$'$ko's theorem on 1-ULC approximation of codimension 1 submanifoldsA. V. ChernavskiiMarch 1, 2011 15:00, Moscow, Lomonosov Moscow State University, Mech.-math. Dept. 12-07 February 22, 2011 (Tue) 148. Rational homotopy of spaces of multi-dimensional long knots $\mathbb R^m\to\mathbb R^N$, $N\ge 2m+2$ (continued)V. É. TurchinFebruary 22, 2011 15:00, Moscow, Lomonosov Moscow State University, Mech.-math. Dept. 12-07 February 4, 2011 (Fri) 149. Rational homotopy of spaces of multi-dimensional long knots $\mathbb R^m\to\mathbb R^N$, $N\ge 2m+2$V. É. TurchinFebruary 4, 2011 16:30, Moscow, Steklov Mathematical Institute, room 534 January 19, 2011 (Wed) 150. Correction of Shtan'ko's original proof of the Ancel–Cannon theorem on locally flat approximation of codimension 1 embeddings of manifolds (continued)A. V. ChernavskiiJanuary 19, 2011 12:00, Moscow, Steklov Mathematical Institute, room 534 December 24, 2010 (Fri) 151. Group completion of moduli spacesR. R. SadykovDecember 24, 2010 17:00, Moscow, Steklov Mathematical Institute, room 534