Valtteri
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### Questions (68)

 19 Does every sequence of rationals, whose sum is irrational, have a subsequence whose sum is rational 11 Function $f(x)$, such that $\sum_{n=0}^{\infty} f(n) x^n = f(x)$ 10 Is $\lim_{x\rightarrow\infty}\frac{x}{\pi(x)}-\ln(x) =-1$? 9 Existence of a sequence that has every element of $\mathbb N$ infinite number of times 8 Functions whose derivative is the inverse of that function

### Reputation (1,245)

 +25 Exponents with base close to $1$. +5 Function $f(x)$, such that $\sum_{n=0}^{\infty} f(n) x^n = f(x)$ +10 Is $\lim_{x\rightarrow\infty}\frac{x}{\pi(x)}-\ln(x) =-1$? +5 Probabilistic modelling of PSO algorithm's first iteration, mean of distribution of minimum

 3 Factorial related problems 2 Determining hyperreal class for $\frac{\epsilon + \delta}{\sqrt{\epsilon^2 + \delta^2}}$ 2 Calculator question involving $\log_2$? 2 Why study linear algebra? 1 Exponents with base close to $1$.

### Tags (91)

 3 number-theory × 2 2 linear-algebra × 2 3 permutations × 2 2 logarithms × 2 3 combinations 2 infinitesimals 3 factorial 2 motivation 2 sequences-and-series × 10 2 calculator

### Accounts (8)

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