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For questions that explicitly reference the binomial coefficients, Pascal's Triangle, and Binomial identities.

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Can this sum be majorized?

Suppose that, we have some real numbers $r_1,r_2,\dots,r_m \in [0,1]$; and we study a sum, $$ S_1= \sum_{i=1}^m \binom{m}{i}(-1)^{i-1}f(r_i), $$ for $f:[0,1]\to[0,1]$ a concave bijection. Now, take an …
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