# Convergence of Taylor series in several variables

#### zetafunction

where do a multiple Taylor series converge ??

i mean if given a function $$f(x,y)$$ can i expand this f into a double Taylor series that will converge on a rectangle ? for example , if one can ensure that it converges for |x| <1 and |y| <1

#### mathman

It depends very much on what f is.

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