Zobrazeno 1 - 10
of 3 396
pro vyhledávání: '"McCarthy, John D"'
Autor:
McCarthy, John D.1 (AUTHOR), Reed, Phil1 (AUTHOR) p.reed@swansea.ac.uk
Publikováno v:
PLoS ONE. 10/22/2024, Vol. 19 Issue 10, p1-13. 13p.
Akademický článek
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Publikováno v:
Social Forces, 2020 Dec 01. 99(2), 870-894.
Externí odkaz:
https://www.jstor.org/stable/27042755
We give algebraic equivalents for certain desirable properties of pullback functors on categories of coverings and group sets, namely nullity zero, essential injectivity, and essential surjectivity. Nullity zero turns out to be equivalent to the noti
Externí odkaz:
http://arxiv.org/abs/1205.3121
Autor:
Calcut, Jack S., McCarthy, John D.
We study pullback from a topological viewpoint with emphasis on pullback of covering maps. We generalize a triad of Quillen on properties of the pullback functor.
Comment: 23 pages, 2 figures
Comment: 23 pages, 2 figures
Externí odkaz:
http://arxiv.org/abs/1205.3122
Autor:
Calcut, Jack S., McCarthy, John D.
For a locally path connected topological space, the topological fundamental group is discrete if and only if the space is semilocally simply-connected. While functoriality of the topological fundamental group for arbitrary topological spaces remains
Externí odkaz:
http://arxiv.org/abs/0904.4739
Publikováno v:
Topol. Appl. 159 (2012), 322-330
In classical covering space theory, a covering map induces an injection of fundamental groups. This paper reveals a dual property for certain quotient maps having connected fibers, with applications to orbit spaces of vector fields and leaf spaces in
Externí odkaz:
http://arxiv.org/abs/0904.4465
Publikováno v:
Journal for the Scientific Study of Religion, 2018 Jun 01. 57(2), 238-257.
Externí odkaz:
https://www.jstor.org/stable/26652124
Autor:
Irmak, Elmas, McCarthy, John D.
In this paper, we prove that each injective simplicial map of the arc complex of a compact, connected, orientable surface with nonempty boundary is induced by a homeomorphism of the surface. We deduce, from this result, that the group of automorphism
Externí odkaz:
http://arxiv.org/abs/math/0606612
In this paper, we study a flag complex which is naturally associated to the Thurston theory of surface diffeomorphisms for compact connected orientable surfaces with boundary. The various pieces of the Thurston decomposition of a surface diffeomorphi
Externí odkaz:
http://arxiv.org/abs/math/0606592