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Anurag A

I work in Algebraic Number Theory and Cryptography.

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120 How to prove that all odd powers of two add one are multiples of three Jan 19 '16
26 Long limit question Feb 26 '15
25 Conjecture: If $ N $ and $ N + 10 $ are prime, then $ N + 20 $ is composite. Jun 15 '14
23 Functions that are continuous only at two points? Jun 8 '14
18 Show that any set in a metric space can be written as the intersection of open sets Jul 24 '17
17 P is a natural number. 2P has 28 divisors and 3P has 30 divisors. How many divisors of 6P will be there? Jan 12 '16
16 If $x$ and $y$ are not both $0$ then $ x^2 +xy +y^2> 0$ Dec 19 '14
13 Show that the numbers $(2n + 1)$ and $(4n^2+1)$ are relatively prime Apr 16 '15
13 Evaluate $\sum_{k=0}^{n} {n \choose k}{m \choose k}$ for a given $n$ and $m$. Jul 3 '14
13 What does $\sum_{k=0}^\infty \frac{k}{2^k}$ converge to? Jun 14 '15
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