Top network posts

• 16 Proving an identity relating to the complex modulus: $z\bar{a}+\bar{z}a \leq 2|a||z|$
• 9 Show that polynomial $X^{n+1}-aX^n+aX-1$ has only roots of module $1$
• 9 Why does $\ker(T) = \{0\} \Leftrightarrow T$ is injective
• 7 How to prove that $\int_{-\infty}^{\infty}f'(t)\exp(-t^2)\text{d}t$ is finite when $\lim_{|t|\to \infty}f(t)\exp(-t^2) = 0$?
• 6 Find $f(1)+\cdots+f(60)$
• 6 Induction differential proof
• 5 Expected value of the shifted inverse of a binomial random variable, and application
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