Mathematics

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earned this badge 5 times.
How to prove that the rank of a matrix is a lower semi-continuous function?
Awarded Jul 8 '20 at 1:05
limit of the sum $\frac{1}{n+1}+\frac{1}{n+2}+\cdots+\frac{1}{2n} $
Awarded Jun 30 '20 at 4:42
Measurable function remaining constant
Awarded Nov 21 '18 at 9:50
Can a symmetric matrix always be represented as the sum of a positive-definite and negative-definite matrix?
Awarded Sep 28 '17 at 22:15
Calculating $\lim_{n\to\infty}\sqrt{n}\sin(\sin…(\sin(x)..)$
Awarded Jan 12 '13 at 19:59

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