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math.AT2001
A remark on the genus of the infinite quaternionic projective space
Donald Yau
It is shown that only countably many spaces in the genus of $\hpinfty$, the infinite quaternionic projective space, can admit essential maps from $\cpinfty$, the infinite complex p…
math.AT2001
On adic genus, Postnikov conjugates, and lambda-rings
Donald Yau
Sufficient conditions on a space are given which guarantee that the -theory ring and the ordinary cohomology ring with coefficients over a principal ideal domain are invariants…
math.AT2001
Clapp-Puppe Type Lusternik-Schnirelmann (Co)category in a Model Category
Donald Yau
We introduce Clapp-Puppe type generalized Lusternik-Schnirelmann (co)category in a Quillen model category. We establish some of their basic properties and give various characteriza…