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www.ams.org/journals/proc/1969-020-02/S0002-9939-1969-0...
www.ams.org/journals/proc/1969-020-02/S0002-9939-1969-0236946-X/S0002-9939-1969-0236946-X.pdf
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mation retract of M. But the theorem above holds in such a case in the form that K is a. "weak deformation retract," (see §4), of M. 2. Notation and preliminary ...
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tarunchitra.com/papers/6510/hw5.pdf
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Mar 21, 2011 ... A deformation retraction in the weak sense of a space X to a subspace A is a ... Show that if X deformation retracts to A in this weak sense, then ...
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www.math.uiowa.edu/~jsimon/COURSES/M201Fall08/HandoutsA...
www.math.uiowa.edu/~jsimon/COURSES/M201Fall08/HandoutsAndHomework/HomotopyOfMapsAndSpaces_v2.pdf
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If the third property above were weakened to just say f(a, t) ∈ A, we would have what Hatcher calls a deformation retraction in the weak sense. (See Hatcher ...
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www.math.ucla.edu/~jhellrun/course_files/Winter%202006/...
www.math.ucla.edu/~jhellrun/course_files/Winter%202006/Math%20225B%20-%20Introduction%20to%20Algebraic%20Topology/homework01.pdf
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Jan 18, 2006 ... a deformation retraction in the weak sense (see Exercise 4) of Y onto Z, but no true deformation retraction. Solution a. X deformation retracts to ...
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www.math.uiowa.edu/~jsimon/COURSES/M201Fall05/ClassNote...
www.math.uiowa.edu/~jsimon/COURSES/M201Fall05/ClassNotes/HomotopyOfMapsAndSpaces_v2.pdf
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deformation retraction. Others, in particular Hatcher, use deformation retraction vs . weak deformation retraction. I will try to avoid confusion by trying to remember ...
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math.stackexchange.com/questions/25964/deformation-retr...
math.stackexchange.com/questions/25964/deformation-retract-on-path-connected-space
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Mar 9, 2011 ... The definition of deformation retract is given as: "A deformation ... gives the definition I did above and calls it a weak deformation retract).
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www.tmna.ncu.pl/files/v17n1-04.pdf
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Z is a weak deformation retract of Y if there exists a continuous r : Y → Z, a deformation η1 of Y , and a deformation η2 of Z, such that η1(u, 1) = r(u) for u ∈ Y and ...
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www.mth.msu.edu/~ivanov/m99.ps
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disc. In that follows, we understand by a weak deformation retract of a topological . space X a subspace Y X such that the inclusion Y !X is a weak homotopy ...
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at.yorku.ca/cgi-bin/bbqa?forum=ask_an_algebraic_topolog...
at.yorku.ca/cgi-bin/bbqa?forum=ask_an_algebraic_topologist;task=show_msg;msg=2783
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that this family of maps is a deformation retraction in the weak sense, however it is not a deformation retraction in the strong sense (the strong sense requires ...
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