New posts in proof-writing

Simple Calculus Proof [duplicate]

Prove $A = (A \setminus B) \cup (A \cap B)$

Proving the inequality $|a-b| \leq |a-c| + |c-b|$ for real $a,b,c$

Does this prove that no sequential squares have a ratio of 2?

Complex numbers - Exponential numbers - Proof

If $\gcd(a,n) = 1$ and $\gcd(b,n) = 1$, then $\gcd(ab,n) = 1$. [duplicate]

Definition: Theorem, Lemma, Proposition, Conjecture and Principle etc.

Transpose of block matrix

Are there any common practices in mathematics to guard against mistakes?

How do you know when trying to find a proof/counterexample isn't worth it?

How do I make a student understand contradiction?

In proofs, are "for each" and "for any" synonyms?

How to prove that $\sqrt{2+\sqrt3}-\sqrt{2-\sqrt3}=\sqrt2$ without squaring both sides

In a math paper, is this considered redundant?

LaTeX/TeX Vs. Mathematica for Typesetting [closed]

Is there more to explain why a hypothesis doesn't hold, rather than that it arrives at a contradiction?

Starting sentences with mathematical symbols.

Can't find mistake in an easy proof.

How to prove that a very large number is not prime

Proof of countable family of finite sets