TY - GEN AU - Mazur, Barry TI - The definition of equivalence of combinatorial imbeddings (p. 5 a 17) ; On the Structure of certain semi-groups of spherical knot classes (p. 19 a 27) ; Orthopy and spherical knots (p. 29 a 48) U1 - 519.1 PY - 1959/// CY - Paris PB - Presses Universitaires de France KW - Analiza combinatorica KW - Teoria grupurilor KW - Geometrie diferentiala N1 - Contine bibliogr. dupa cap. - Inaintea tit.: Institut des Hautes Etudes Scientifiques ER -