01.01.02 (Differential equations, dynamical systems, and optimal control)
Main publications:
Ucheb. pos. po kursu "Vysshaya matematika". Kratnye integraly. Vektornyi analiz : (Dlya energ. spets. vech. formy obucheniya) / N. V. Gulichev, A. B. Krygin, L. G. Popov; Red. V. A. Yudin; Mosk. energ. in-t. - Moskva : MEI, 1990. - 117 s. : il.
Fazovye portrety dinamicheskikh sistem na ploskosti (grubye sistemy) : ucheb. pos. po kursu "Vysshaya matematika" dlya stud. MEI (TU) / A. B. Krygin ; Minobrnauki RF, FAO, Moskovskii energeticheskii in-t (tekhn. un-t). - Moskva : Izd. dom MEI, 2006. - 56 s. : il.; 20 sm.; ISBN 5-903072-65-8
A. B. Krygin, “On $\omega$-limit sets of a cylindrical cascade”, Izv. Akad. Nauk SSSR Ser. Mat., 39:4 (1975), 879–898; Math. USSR-Izv., 9:4 (1975), 831–849
A. B. Krygin, “An example of a continuous flow on the torus with mixed spectrum”, Mat. Zametki, 15:2 (1974), 235–240; Math. Notes, 15:2 (1974), 133–136