Re: Sinh[y]/y as y->0?
- To: mathgroup at smc.vnet.net
- Subject: [mg33494] Re: Sinh[y]/y as y->0?
- From: Erk Jensen <Erk.Jensen at cern.ch>
- Date: Sun, 24 Mar 2002 01:43:45 -0500 (EST)
- References: <a7csli$i0t$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
aes wrote:
>
> A particular calculation produces at an early stage the intermediate result
>
> p1 = (Sin[x]/x) + (Sinh[y]/y) , (x and y both real)
>
> and this result then feeds into further expressions in a lengthy symbolic
> calculation.
>
> When I try to do any numerical evaluations of the final expressions with either
> x or y = 0, I get "Indeterminate expression" or "infinity 1/0" error messages,
> even though the expressions themselves, like the expression above, are perfectly
> determinate and finite for those limits.
>
> Any simple way to make this expression behave as it should under numerical
> evaluation?
Look here
Normal[Series[(Sin[x]/x) + (Sinh[y]/y), {x, 0, 4}, {y, 0, 4}]]
for a series approximation
Ciao
-erk-