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Does $\pi$ contain all possible number combinations?

"The Egg:" Bizarre behavior of the roots of a family of polynomials.

Why do mathematicians use single-letter variables?

In (relatively) simple words: What is an inverse limit?

What books must every math undergraduate read?

Eigenvectors of real symmetric matrices are orthogonal

Good books and lecture notes about category theory.

Exterior Derivative vs. Covariant Derivative vs. Lie Derivative

Open problems in General Relativity

Striking applications of integration by parts

Why did mathematicians take Russell's paradox seriously?

What is category theory useful for?

Real life applications of Topology

Are half of all numbers odd?

When to learn category theory?

Why “characteristic zero” and not “infinite characteristic”?

Complete course of self-study [closed]

Good Physical Demonstrations of Abstract Mathematics

What concept does an open set axiomatise?

True or false? $x^2\ne x\implies x\ne 1$

Is the vector cross product only defined for 3D?

In categorical terms, why is there no canonical isomorphism from a finite dimensional vector space to its dual?

What is a universal property?

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How to effectively and efficiently learn mathematics [closed]

Is learning (theoretical) physics useful/important for a mathematician?

Mathematical subjects you wish you learned earlier [closed]

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Why should we prove obvious things?

Why should I care about adjoint functors