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List Question

A trivial proof of Bertrand's postulate

Proof that commutative groupoid $(G,*)$ is a semigroup

Is $S^2$ homeomorphic to $D^2$?

Spherical Cap of Riemann sphere under stereographic projection

Notation Help with Equivalence Relation Proofs: A Book of Abstract Algebra Chapter 13 Exercise J1

Subring of $\mathbb{Z}[x,y]$ generated by $\{yx^i | i\geq 1\}$ is not Noetherian

Verification of a proof for problem 2.2.8 in Royden's Real Analysis (4th Ed.)

When does trivial topology implies continuous functions are constant functions?

Pasture in the field

Complex Number Module

Show that $\mathbb Q(\sqrt m,\sqrt n)=\mathbb Q(\sqrt {m}+\sqrt {n})$.

Partial Differential equation and wave equation

Proving that any finite abelian group that can act freely on $S^n$ is cyclic.

show that $\|f\|_p = \max_{g\in L^q(E)\\\|g\|_q\le 1} \int_E f.g~d\mu$

calculate the volume of the solid limited by the surfaces...

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