### Answers (107)

 10 What is an example of a proof by minimal counterexample? 7 If $A$ is dense in $\Bbb Q$, then it must be dense in $\Bbb R$. 6 Proving convergence of a bizarre sequence 5 Are there infinitely many prime numbers of the form $p^2+4$ with $p$ prime? 4 Can we remove the absolute value from inequality $|a-b|<ε$?

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 +10 Partial Sums and the Leibniz Formula for Pi +10 Can we remove the absolute value from inequality $|a-b|<ε$? +10 Will Math Ever Stop Using Paper? +5 Exploiting a Diophantine approximation of $\pi^4$ into giving a series of rationals for $\pi^4$

### Questions (36)

 27 Constructing an infinite chain of subfields of 'hyper' algebraic numbers? 18 Exploiting a Diophantine approximation of $\pi^4$ into giving a series of rationals for $\pi^4$ 11 Proving $\int_0^r{(r^m-x^m)^{1/m}dx}=\frac{\Gamma\left(\frac{1}{m}+1\right)\Gamma\left(\frac{1}{m}+1\right)}{\Gamma\left(\frac{2}{m}+1\right)}r^2$ 8 On the sets of sums $\sum\limits_{n=1}^\infty\frac{a_n}{n^s}$ with $(a_n)$ periodic and integer valued, for different values of $s$ natural number 6 Is satisfying $\sum_{i=1}^{n}{x_i^{y_i}}=r$ NP Complete? [closed]

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 18 real-analysis × 17 10 examples-counterexamples 13 proof-writing × 8 9 elementary-number-theory × 12 12 sequences-and-series × 32 9 number-theory × 10 10 proof-verification × 10 9 calculus × 9 10 infinite-descent 7 diophantine-equations × 11

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