Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Helga Schirmer"'
Publikováno v:
Topology and its Applications. 125(1):1-46
Let p :M→X and q :N→Y be locally trivial bundles, with fibres F and G , respectively, where all the spaces are connected closed manifolds, but neither the manifolds nor the bundles need be orientable. Assume further that dim X =dim Y and dim F =d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::48f8d7578b84fef94a5f7a73176bf540
Publikováno v:
Topology and its Applications. 116(1):5-27
Brouwer's homological degree has the multiplicative property for the composition of maps. That is, if f :X→Y and g :Y→Z are maps between closed oriented manifolds X,Y,Z of the same dimension, then | deg (g∘f)|=| deg (f)|| deg (g)| . Hopf's abso
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::316cfe60328f4b698b2458f77149335c
Autor:
Robert F. Brown, Helga Schirmer
Publikováno v:
Pacific Journal of Mathematics. 198:49-80
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0e4cf0a1981ffe17896df91e39374380
https://doi.org/10.2140/pjm.2001.198.49
https://doi.org/10.2140/pjm.2001.198.49
Autor:
Helga Schirmer, Robert F. Brown
Publikováno v:
Topology and its Applications. 92(3):247-274
A relative root Nielsen number N rel (ƒ; c) is introduced which is a homotopy invariant lower bound for the number of roots at c for a map of pairs of spaces ƒ : (X, A) → (Y, B) and c ϵ Y . Conditions are given which ensure that N rel (ƒ; c) is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3df93fc0afb51917eeea15392f395a04
Publikováno v:
Topology and its Applications. 66:129-157
Let f : X → X be a selfmap of a path-connected space and let a ϵ X. We call x ϵ X an irreducible root of, fn, at a if fn(x) = a but fm(x) ≠ a for all m < n, where fn denotes the nth iterate of f. A lower bound N In(f;a) for the number of irredu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::89eacd8fb79a23112d776c2c981d095b
https://doi.org/10.1016/0166-8641(95)00024-b
https://doi.org/10.1016/0166-8641(95)00024-b
Publikováno v:
Topology and its Applications. 63:97-116
Two homotopy invariant Nielsen type numbers exist for periodic points of a self-map ƒ: X → X of a compact connected ANR X, namely NP n (ƒ) , the Nielsen type number of period n, and NΦ n (ƒ) , the Nielsen type number of the nth iterate. The fir
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::331aee4591a0749074f5bae0c4d23de4
https://doi.org/10.1016/0166-8641(94)00066-c
https://doi.org/10.1016/0166-8641(94)00066-c
Autor:
Helga Schirmer
Publikováno v:
Topology and its Applications. 52:181-202
Let ƒ:(X,A1,A2) → (X,A1,A2) be a selfmap of a triad which consist of a compact connected polyhedron X and two subpolyhedra A1 and A2 so that X = A1 ∪ A2. A Nielsen type number N(ƒ;A1 ∪ A2), called the Nielsen number of the triad, is defined w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d8ae4d207f90640a9a5c23aeed325225
https://doi.org/10.1016/0166-8641(93)90036-d
https://doi.org/10.1016/0166-8641(93)90036-d
Autor:
Helga Schirmer
Publikováno v:
Nielsen Theory and Dynamical Systems. :291-309
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0191fe08e1440e6154171e061c13c6da
https://doi.org/10.1090/conm/152/01329
https://doi.org/10.1090/conm/152/01329
Autor:
Helga Schirmer
Publikováno v:
Fundamenta Mathematicae. 137:1-8
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::05e3a3a1a453142044ce2169bc584d1f
https://doi.org/10.4064/fm-137-1-1-8
https://doi.org/10.4064/fm-137-1-1-8
Autor:
Helga Schirmer
Publikováno v:
Topology and its Applications. 37(2):153-162
Let ⨍:X→X be a self-map of a compact ANR and A ⊂ X a closed subset. Two conditions are stated which are necessary for the realization of A as the fixed point set of a map g in the homotopy class of f, and it is shown that these conditions are a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9cf3cc79d099f25010a69ab373153543