David Moews

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10,258 reputation

1924

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248 Answers

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21	Does every sequence of rationals, whose sum is irrational, have a subsequence whose sum is rational
20	How can I calculate $\sin\left(10^{10^{100}} - 10\right)^\circ$?
17	Study the convergence of $\sum_{n=1}^{\infty}\Bigl( \sqrt[n]{1+\frac{1}{n}}-1\Bigr)$
17	Is this sequence unbounded?
15	Showing $\prod\limits_{i<j} \frac{x_i-x_j}{i-j}$ is an integer

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10,258 Reputation

+10	Is the set $\{\sin (p_{i})\| p_{i} \,\,\mbox{is a prime number, for all}\,\,i\in \mathbb{N}\}$ linearly independent?
+10	How to prove that two non-zero linear functionals defined on the same vector space and having the same null-space are proportional?
+10	How many positive numbers need to be added together to ensure that the sum is infinite?
+10	A closed set in a metric space is $G_\delta$

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151 Tags

93 sequences-and-series × 19	43 probability × 31
65 combinatorics × 29	41 calculus × 15
65 number-theory × 12	39 real-analysis × 26
51 elementary-number-theory × 11	34 general-topology × 11
46 linear-algebra × 7	32 matrices × 6

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6 Accounts

$Mathematics Stack Exchange$	Mathematics	10,258 rep	1924
	Science Fiction & Fantasy	326 rep	14
	Stack Overflow	176 rep	3
	English Language & Usage	101 rep	1
	Physics	101 rep	1

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