Please provide additional context, which ideally explains why the question is relevant to you and our community. Some forms of context include: background and motivation, relevant …

May 8, 2019 · What does $C_c^\infty (\mathbb {R})$ stand for? I know what $C^k (\mathbb {R})$ spaces are, but I don't know what the $c$ in the subscript means.

Jan 28, 2018 · The meaning behind $ (X^TX)^ {-1}$ Ask Question Asked 7 years, 10 months ago Modified 1 year, 11 months ago

Mar 13, 2022 · Can someone please help me understand the meaning of "commas and periods" that appear on the right side of mathematical functions? For example, in another question …

Apr 9, 2020 · Intuitive meaning of Neumann boundary condition Ask Question Asked 5 years, 8 months ago Modified 5 years, 8 months ago

In addition to the other answers you receive that will address this more directly, you might be interested in reading about Hurewicz's Theorem, which relates homotopy and homology …

I am helping with homework. I am stumped here - What is the meaning of the small round circle, or small "o" in question 19 (that I underlined) and question 20

Oct 15, 2013 · Meaning of signed volume Ask Question Asked 12 years, 3 months ago Modified 7 years, 2 months ago

Sep 3, 2021 · My suggestion is to forget "holes" and focus on understanding various definitions of homology groups.

Dec 10, 2025 · I just wanted to check my understanding of a phrase in Hartshorne, and the following calculations. In example II.3.2.4, we consider $\\mathrm{Spec}(k[x, y])$ and consider …