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Why does $1+2+3+\cdots = -\frac{1}{12}$?

Is computer science a branch of mathematics?

Using proof by contradiction vs proof of the contrapositive

How to put 9 pigs into 4 pens so that there are an odd number of pigs in each pen?

How to write a good mathematical paper?

Should I be worried that I am doing well in analysis and not well in algebra? [closed]

What is this pattern called?

Geometric interpretation of connection forms, torsion forms, curvature forms, etc

Importance of Exercises in Mathematics for Self-Studying

Convergence of the sequence $\sqrt{1+2\sqrt{1}},\sqrt{1+2\sqrt{1+3\sqrt{1}}},\sqrt{1+2\sqrt{1+3\sqrt{1+4\sqrt{1}}}},\cdots$ [duplicate]

Does the sequence $\{\sin^n(n)\}$ converge?

Is $2^{\aleph_0} = \aleph_1$?

Twilight Zelda Guardian Puzzle : Shortest Path (UPDATE: ADDED RULES)

What are the differences in mental skills required to master abstract algebra and analysis?? [closed]

How to memorize the trigonometric identities?

Give an intuitive explanation for polynomial quotient ring, or polynomial ring mod kernel

Prove $(8k)^{8k}+(8k+1)^{8k+1}$ and $(8k+1)^{8k+1}+(8k+2)^{8k+2}$ are never perfect squares

If $\limsup_n\sqrt[n]{a_n}=\frac{1}{r}$, then $\limsup_n\sqrt[n]{(n+1)a_{n+1}}=?$

Applonius Circle/ Ford Circle / Infinite GP / Circle Packing

Estimation of the n-th derivative of a complex function using Cauchy integral formula.

If $\tau_1, \tau_2,\tau_3$ then which are correct?

find the value of $\lim_{x\to0}\frac{e-(1+x)^{\frac{1}{x}}}{x}$ [duplicate]

Putnam: Show that $a(n)=b(n+2)$

Prob. 6, Sec. 21 in Munkres' TOPOLOGY, 2nd ed: How to show directly that this sequence of functions does not converge uniformly?

Represent transformation respect to the following basis

Find the last digit of $\binom{2016}{21}$