New posts in Proof Writing

Being too pedantic with writing proofs

Solve $2x^2+y^2-z=2\sqrt{4x+8y-z}-19$

Purely geometric proof of inverse trigonometric functions derivatives

Mathematical writing guidelines

Properties of centralization in group theory

Given $f(x)$ is continuous on $[0,1]$ and $f(f(x))=1$ for $x\in[0,1]$. Prove that $\int_0^1 f(x)\,dx > \frac34$.

Countability of a sequence of natural numbers

Prove that a function between metric spaces $(X,d_{X})$ and $(Y,d_{Y})$ is continuous iff the pre-image of open sets is open

Proof using Fundamental Theorem of Calculus (Showing RHS = LHS)

Prove that $A \cup C \subseteq B \cup C$ iff $A \setminus C \subseteq B \setminus C$