Re: Substiuting variables within an integral
- To: mathgroup at smc.vnet.net
- Subject: [mg111335] Re: Substiuting variables within an integral
- From: Simon <simonjtyler at gmail.com>
- Date: Wed, 28 Jul 2010 02:53:02 -0400 (EDT)
- References: <201007250558.BAA00160@smc.vnet.net> <1280108108.3887.100.camel@warp>
You can try working with the integrand and limits with out the
integral. Something like
f[x] Dt[x] && x0<x<x1
Then using replacement rules should just work.
The total derivative Dt assumes that everything is a variable, so if
you have any other parameters floating around you have to give them
the attribute Constant.
You can then get mathematica to check the form of the integrand - if
it matches what you want, then integrate.
On Jul 27, 6:14 pm, "Eduardo M. A. M.Mendes" <emammen... at gmail.com>
> I need to do a variable substitution within an integral in several different
> ways. I need Mathematica to rearrange the integral with the new variable
> definition without solving it. The resulting integral will be variations
> of Euler function. After seeing the resulting integral, I need Mathematica
> to actually solve it for me (that is, Mathematica needs to recognize that it
> is an Euler function). Can this be done?
> Many thanks
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