List questions from mayer-vietoris-sequence | MathQA

Understanding the correlation between the Van Kampen theorem and Mayer Vietoris sequences from the Hatcher Algebraic Topology text

Published on 08 Jun 2022 - 18:11

Decomposition of a space as a union of two closed subspaces that dosen't form an Mayer-Vetoris pair.

Published on 29 Sep 2022 - 2:58

Injectivity of map into $H_n(S^n \setminus h(X \times [0,\frac{1}{2}]) \oplus H_n(S^n \setminus h(X \times [\frac{1}{2},1]))$

Published on 01 Dec 2022 - 8:37

Computing the integral cohomology ring of intersection of two spaces

Published on 21 Dec 2022 - 10:27

Is the cohomology of a pushout of open sets a pullback of cohomologies?

Published on 24 Dec 2022 - 2:50