2004, том 4, номер 4

This issue of the Moscow Mathematical Journal — as well as the preceding one — is dedicated to Boris Feigin on the occasion of his 50^th birthday.

	Counting minimal form factors of the restricted sine-Gordon model M. Jimbo, T. Miwa, Yu. Takeyama		787
	$t$-structures on the derived categories of holonomic $ mathscr D$-modules and coherent $\mathscr O$-modules M. Kashiwara		847
	Parabolic character sheaves. II G. Lusztig		869
	Character sheaves on reductive Lie algebras I. Mirković		897
	Remarks on modules over deformation quantization algebras R. Nest, B. L. Tsygan		911
	Bihamiltonian elliptic structures A. V. Odesskii		941
	Positivity and canonical bases in rank 2 cluster algebras of finite and affine types R. Sherman, A. V. Zelevinskii		947
	Anatole Katok M. I. Brin, B. Hasselblat, Yu. S. Ilyashenko, A. G. Kushnirenko, Ya. B. Pesin, A. B. Sossinski, M. A. Tsfasman		977