Jack D'Aurizio

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2,937 reputation

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	location	Pisa, Italy
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visits	member for	7 months
	seen	May 14 at 18:52
stats	profile views	241

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111 Answers

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13	proof of $\sum\nolimits_{i = 1}^{n } {\prod\nolimits_{\substack{j = 1\\j \ne i}}^{n } {\frac{{x_i }}{{x_i - x_j }}} } = 1$
10	trouble with this integral
8	Solve the following equivalency
6	Integrate $\sqrt{1+9x^4} \, dx$
6	Show $\left\lvert\sum_{k=-n}^n \frac{\sin k t }{k}\right\rvert \le \pi + 2$ for all $n$ and $t$, $t \in [0,2\pi]$

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2,937 Reputation

+50	Inequality in a bounded real sequence
+15	Sum of $\sum_{n=1}^\infty \frac{(-1)^n}{n^2+(n^2-1)^2}$
+10	Contest problem about convergent series
+10	If a graph G has chromatic number 3, then G contains a subgraph isomorphic to $K_3$?

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10 Questions

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10	Inequality in a bounded real sequence
10	Two questions about weakly convergent series related to $\sin(n^2)$ and Weyl's inequality
9	How to find a total order with constrained comparisons
7	About the asymptotic behaviour of $\sum_{n\in\mathbb{N}}\frac{x^{a_n}}{a_n!}$
6	Monotonic version of Weierstrass approximation theorem

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84 Tags

28 sequences-and-series × 17	19 calculus × 15
21 real-analysis × 19	19 homework × 15
20 inequality × 17	19 summation × 5
20 integration × 9	14 geometry × 13
20 elementary-number-theory × 8	13 products

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2 Accounts

$Mathematics Stack Exchange$	Mathematics	2,937 rep	314
	Stack Overflow	111 rep	1

14 Badges

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Nice Answer × 2	Commentator
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