Idempotent topological groupoids with non-empty center

Mathematische Zeitschrift - Tập 125 - Trang 70-78 - 1972
Kermit Sigmon1
1Department of Mathematics, University of Florida, Gainesville, USA

Tài liệu tham khảo

Bacon, P.: Compact means in the plane. Proc. Amer. Math. Soc.22, 242–246 (1969). Browder, W.: On torsion inH-spaces. Ann. of Math. (2)74, 24–51 (1961). Crummer, A.: Topological means. Doctoral dissertation. University of Florida, 1971. Eckmann, B.: Räume mit Mittelbildungen. Commentarii Math. Helvet.28, 329–340 (1954). Eckmann, B. Ganea, T., Hilton, P.: Generalized means, from Studies in Mathematical Analysis and Related Topics, edited by Gilber et. al. Stanford Univ. Press 1962. Scheffer, W.: Generalizations of the homotopy lemma for Alexander cohomology. Master's Thesis, University of Florida, 1971. Sigmon, K.: Acyclicity of compact means. Michigan Math. J.16, 111–115 (1969). Spanier, E.: Algebraic topology. New York: McGraw-Hill 1966. Whitehead, J. H. C.: On the homotopy type of ANR's. Bull. Amer. Math. Soc.54, 1133–1145 (1948).