MATH
Login Or Sign up

List Question

15
83
Views

Homotopical intuition for (co)limit over comma categories

Published on
#reference-request #category-theory #homotopy-theory
255
Views

Prove that $CP^3/CP^1$ is homotopy equivalent to $S^4\vee S^6$

Published on
#linear-algebra #general-topology #algebraic-topology #homology-cohomology #homotopy-theory
50
Views

Cover of $S^1$ such that their intersections are path connected

Published on
#algebraic-topology #homotopy-theory
97
Views

Retract from compact convex set without a point into its boundary.

Published on
#general-topology #algebraic-topology #homotopy-theory
46
Views

Isotopies in embeddings into $S^n$

Published on
#algebraic-topology #homotopy-theory
85
Views

Reference for Stasheff's Associahedra Operad

Published on
#algebraic-topology #reference-request #homotopy-theory #loop-spaces #operads
102
Views

piecewise continuously differentiable path homotopy with fixed endpoints

Published on
#real-analysis #algebraic-topology #differential-topology #homotopy-theory
78
Views

Compute $\operatorname{Ext}_{\mathcal{A}_2}^{s,t}(\mathcal{A}_2/ I(\mathcal A_2 . Sq^1), \mathbb F_2).$

Published on
#homotopy-theory #hopf-algebras #spectral-sequences
27
Views

A class in $H^k(E)$ is pulled back from $H^k(X)$ if the class is zero when restricted to a fiber. How to show this explicitly?

Published on
#algebraic-topology #homotopy-theory #fiber-bundles #obstruction-theory
127
Views

Is there a topological group $G$ such that the $\pi_1(G)$ of this group is itself?

Published on
#algebraic-topology #homotopy-theory #topological-groups #fundamental-groups
94
Views

Is there a topological space X, which is non-contractible and for which every mapping $S^n → X$ for n ≥ 1 is homotopic to a constant mapping?

Published on
#algebraic-topology #homotopy-theory
107
Views

Suspension homomorphisms between homotopy groups of spheres

Published on
#algebraic-topology #homotopy-theory
56
Views

Clarify on Kerodon 1.1.3.11

Published on
#category-theory #homotopy-theory #simplicial-stuff
87
Views

Complement of compact subset of the plane is simply-connected

Published on
#general-topology #homotopy-theory
72
Views

Smooth fiber bundles over a contractible manifold

Published on
#smooth-manifolds #homotopy-theory #fiber-bundles

Trending Questions

Popular # Hahtags

second-order-logic numerical-methods puzzle logic probability number-theory winding-number real-analysis integration calculus complex-analysis sequences-and-series proof-writing set-theory functions homotopy-theory elementary-number-theory ordinary-differential-equations circles derivatives game-theory definite-integrals elementary-set-theory limits multivariable-calculus geometry algebraic-number-theory proof-verification partial-derivative algebra-precalculus

Popular Questions

Copyright © 2021 JogjaFile Inc.