Results 41 to 50 of about 72 (72)

ABSTRACT HOMOTOPY. IV. [PDF]

open access: yesProc Natl Acad Sci U S A, 1956
Kan DM.
europepmc   +1 more source

FUNDAMENTAL GROUPS ON A LORENTZ MANIFOLD. [PDF]

open access: yesProc Natl Acad Sci U S A, 1960
Smith JW.
europepmc   +1 more source

Lagrangian Relations and Quantum L ∞ Algebras. [PDF]

open access: yesCommun Math Phys
Jurčo B, Pulmann J, Zika M.
europepmc   +1 more source

Block mapping class groups and their finiteness properties. [PDF]

open access: yesGeom Dedic
Aramayona J   +4 more
europepmc   +1 more source

Monomorphisms and epimorphisms in homotopy theory

Israel Journal of Mathematics, 1983
The author improves the results in his paper with \textit{P. Hilton} [see the preceding review] on Hopfian and co-Hopfian objects in the pointed homotopy category \({\mathcal K}\) of path-connected CW-spaces by replacing finiteness conditions on homology by Hopficity conditions. Furthermore the question is studied of when a morphism \(f: X\to Y\) in \({
openaire   +2 more sources

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