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11 Questions

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Group Structure on Homotopy Classes of Homotopies

homotopy-theory model-categories

Dec 22 at 18:11 HelloDarkness 1,071

votes

answers

views

When does a homotopy exist?

algebraic-topology homotopy-theory homotopy-extension-property

Sep 16 at 19:39 HelloDarkness 1,071

votes

answer

views

Right Lifting Properties Against Relative Cell Complexes

category-theory homotopy-theory model-categories

Aug 18 at 3:06 Zhen Lin 73.7k

votes

answer

129

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Triviality of Vector bundles.

vector-bundles fiber-bundles

Jul 5 at 19:09 Jack Lee 35.9k

vote

answer

views

Is the inclusion of the wedge sum into the reduced cylinder a relative cell complex?

algebraic-topology homotopy-theory cw-complexes

Nov 4 at 14:18 Connor Malin 7,543

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answer

views

Homeomorphism from the real numbers to the real numbers with restriction to the Cantor set.

real-analysis cantor-set

Sep 25 '19 at 4:58 Eric Wofsey 259k

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answer

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Example of two subrings with unity of a ring with unity whose intersection is non trivial and has no unity.

ring-theory rngs

Aug 28 '19 at 21:37 gregorygsimon 56

votes

answer

views

Confusion about the underlying function of a Functor.

functions category-theory functors

Jun 27 at 1:22 yoyo 7,517

votes

answers

views

When is the tensor product of representations inequivalent.

abstract-algebra group-theory representation-theory

Mar 24 at 17:32 HelloDarkness 1,071

votes

answers

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Isomorphism of X to itself. [closed]

linear-algebra vector-space-isomorphism

Dec 26 '18 at 13:04 Community♦ 1

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answer

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Eigenvalues of Adjoint Transformation

linear-algebra eigenvalues-eigenvectors linear-transformations

Dec 2 '18 at 1:29 Anders Beta 1,013

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11 Questions

Group Structure on Homotopy Classes of Homotopies

When does a homotopy exist?

Right Lifting Properties Against Relative Cell Complexes

Triviality of Vector bundles.

Is the inclusion of the wedge sum into the reduced cylinder a relative cell complex?

Homeomorphism from the real numbers to the real numbers with restriction to the Cantor set.

Example of two subrings with unity of a ring with unity whose intersection is non trivial and has no unity.

Confusion about the underlying function of a Functor.

When is the tensor product of representations inequivalent.

Isomorphism of X to itself. [closed]

Eigenvalues of Adjoint Transformation