TY - DATA TI - American Mathematical Society translations T2 - American Mathematical Society Translations: Series 2, SN - 9781470432188 (online) KW - Homotopy theory N1 - Includes bibliographical references; Investigations in the homotopy theory of continuous mappings. I. The algebraic theory of systems. II. The natural system and homotopy type /; Homotopy theory of continuous mappings and of vector fields; M. M. Postnikov; V. G. Boltyanskii UR - http://www.ams.org/trans2/007 ER -