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Mathematics
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shinzou
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15
Combinatorial proof of $\sum_{k=1}^n k k!=(n+1)!-1$
Mar 20, 2015
11
Is the sum of two distinct primes an injective function on integers?
May 3, 2018
11
Prove there's a simple path of length $k$ in a simple graph $G$ where all the vertices have degree of at least $k$
Jun 18, 2015
7
Prove if $f$ has a right inverse function: $f\circ g=id_x$ $\iff$ $f$ is onto $Y$
May 11, 2014
7
Finding limits using definite integrals $\lim_{n\to\infty}\sum^n_{k=1}\frac{k^{4}}{n^{5}}$
May 13, 2015
6
When is it allowed to take a constant out of a series?
Apr 11, 2015
6
How is $2^{\log_4 n}= n^{\log _42}$?
Jan 25, 2016
5
Partial fractions - different results when done in steps than not
Apr 26, 2015
5
In every set of $14$ integers there are two that their difference is divisible by $13$
May 25, 2015
5
Proving that if $a,b,c\in \mathbb N$ and $a^2+b^2=c^2$ then $abc$ is even.
Jan 27, 2015
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183
Using map() on an iterator
107
Why is Nike pronounced "naikee" and not "naik"?
27
QuotaExceededError (DOM Exception 22): The quota has been exceeded on Safari in incognito
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VS code indentation when copying and pasting is messed up
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Clearing old browsing data in Chrome instead of newer data