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How to study math to really understand it and have a healthy lifestyle with free time? [closed]

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

Proofs that every mathematician should know. [closed]

Funny identities [closed]

Best Fake Proofs? (A M.SE April Fools Day collection) [closed]

Is there a 0-1 law for the theory of groups?

List of Interesting Math Blogs [closed]

A Topology such that the continuous functions are exactly the polynomials

Why is Euler's Gamma function the "best" extension of the factorial function to the reals?

Deleting any digit yields a prime... is there a name for this?

Is there a homology theory that counts connected components of a space?

Online tool for making graphs (vertices and edges)?

How to prove $\int_0^1\tan^{-1}\left[\frac{\tanh^{-1}x-\tan^{-1}x}{\pi+\tanh^{-1}x-\tan^{-1}x}\right]\frac{dx}{x}=\frac{\pi}{8}\ln\frac{\pi^2}{8}?$

What remains in a student's mind [closed]

How were 'old-school' mathematics graphics created?

Chatting about mathematics (with real-time LaTeX rendering)

How to learn from proofs?

All polynomials with no natural roots and integer coefficients such that $\phi(n)|\phi(P(n))$

Why is "the set of all sets" a paradox, in layman's terms?

Is infinity an odd or even number?

Number of simple edge-disjoint paths needed to cover a planar graph

Alice and Bob play the determinant game

Motivation for spectral graph theory.

Volumes of n-balls: what is so special about n=5?

Connections between metrics, norms and scalar products (for understanding e.g. Banach and Hilbert spaces)

What is so interesting about the zeroes of the Riemann $\zeta$ function?

Do "Parabolic Trigonometric Functions" exist?

Algebra: Best mental images

$n$th derivative of $e^{1/x}$

Period of the sum/product of two functions