Re: Re: Assuming n is even
- To: mathgroup@smc.vnet.net
- Subject: [mg10319] Re: [mg10303] Re: Assuming n is even
- From: seanross@worldnet.att.net
- Date: Mon, 5 Jan 1998 22:24:34 -0500
- References: <68l3e7$mf6@smc.vnet.net> <199801050847.DAA01981@smc.vnet.net.>
Paul Abbott wrote:
>
> Rod Pinna wrote:
>
> > Hopefully this isn't a FAQ.
> >
> > Is it possible to get Mathematica (3.0) to assume that n is an even
> > number for an indefinite integral?
>
> Good to see a posting from the University of Western Australia! It is a
> FAQ but the answer is, briefly, no. A recent and related question was:
>
> >I want to make an assignment T = k/omega and somehow cause Mathematica
> >to know that k is an integer. How do I do this?
>
> In my opinion, the best way to is using pattern-matching and replacement
> rules (see The Mathematica Journal 2(4): 31). E.g., for n integral, we
> have
>
> {Cos[(n_)*Pi] -> (-1)^n, Sin[(n_)*Pi] -> 0};
>
> Please post your integral so that perhaps readers can make other
> suggestions.
>
> Cheers,
> Paul
Another possibility is to use the Assumptions option in the Integrate
command. I have not experimented with it, but there may be a way. --
Remove the _nospam_ in the return address to respond.
- References:
- Re: Assuming n is even
- From: Paul Abbott <paul@physics.uwa.edu.au>
- Re: Assuming n is even