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Latex \binom with other types of brackets

math-mode asked Feb 14, 2015 at 13:34

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Math Olympiads: GCD of terms in a sequence equals GCD of terms in other sequence

elementary-number-theory contest-math problem-solving asked Apr 13, 2014 at 20:51

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Prove that the union of two disjoint countable sets is countable

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How do I derive the formula for the sum of squares?

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CHECK: Let p be a prime number. Show that $\binom{2p}{p}$ is congruent to $2$ mod $p$.

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Non-inductive, not combinatorial proof of $\sum_{i \mathop = 0}^n \binom n i^2 = \binom {2 n} n$

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Help with a Binomial Identity: $\sum_{k=0}^{\infty} \binom{n+k}{k}2^{-k} = 2^{n+1}$

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Proving two consecutive odd primes have at least 3 prime divisors.

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