help plzzz

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- Sep 29th 2013, 10:57 PMVendettai used to love math :/ numerical analysis
help plzzz

- Oct 1st 2013, 06:12 PMemakarovRe: i used to love math :/ numerical analysis
Well, if $\displaystyle f_i\in C^{n_i}(\Omega)$, then both $\displaystyle \sum_i f_i$ and $\displaystyle \prod_i f_i$ are at least in $\displaystyle C^{\min_i n_i}(\Omega)$ (for finite sums and products)...