Aug 4, 2021 · Whenever a problem or question of isomorphism comes up I am clueless as to what they mean. From my understanding an isomorphism is in terms of graph theory where it is the same thing …

Feb 1, 2026 · An infinite set can be characterised as a set which is bijective with a proper subset of itself. Just because the first mapping you thought of is not a bijection doesn't mean that no bijection …

Jul 10, 2021 · While reading about quadratic equations, I came across Newton's Identity formula which said we can express $\\alpha^n+\\beta^n$ in simpler forms but not given any ...

Dec 6, 2025 · For basic questions about limits, continuity, derivatives, differentiation, integrals, and their applications, mainly of one-variable functions.

Jun 10, 2025 · This is one of a pair of questions trying to understand this comment on xkcd forum contest My number is bigger than yours!. The comment author proposes adding a new axiom …

Apr 5, 2023 · I found this question talking about the relation between an equilateral triangle and cubics with three distinct real roots. Here's an image from the original post with an example: What this post s...

I need some help with this problem: $$439^{233} \\mod 713$$ I can't calculate $439^{223}$ since it's a very big number, there must be a way to do this. Thanks.

Aug 27, 2024 · In my high school chemistry class, my teacher insists that the "round to even" rule means rounding to the nearest even number whenever the next digit is 5, regardless of any …

Sep 19, 2021 · The question that has bothered me for a while has been answered and closed here (Implication in mathematics - How can A imply B when A is False?) and probably many other posts. …

5 days ago · for some primes p, q p, q. We call those numbers "identical prime twins". (an idea from my mentor because identical twins are more alike than twins) Or maybe they were already named ?? …