[13260] in Athena Bugs
decmips 7.7G: Maple
daemon@ATHENA.MIT.EDU (reidmp@MIT.EDU)
Tue Feb 28 13:30:46 1995
From: reidmp@MIT.EDU
Date: Tue, 28 Feb 1995 13:30:11 -0500
To: mishache@MIT.EDU, bugs@MIT.EDU
Cc:
Hi,
I just wanted to let you know that I'm investigating your Maple bug
report. I've verified that I get the same result as you did. I'm
not sure if it is a bug because I'm not overly familiar with
integrating expressions that contain the Dirac function. I'm
forwarding the bug report to the software vendor to see what they
have to say about it. When I hear back from them I'll let you know.
Reid M. Pinchback
>From mishache@MIT.EDU Fri Feb 10 16:35:39 1995
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>From: mishache@MIT.EDU
>Received: by milanese.MIT.EDU (5.57/4.7) id AA19341; Fri, 10 Feb 95 16:35:27 ->0500
>Message-Id: <9502102135.AA19341@milanese.MIT.EDU>
>To: bugs@MIT.EDU
>Subject: decmips 7.7G: Maple
>Date: Fri, 10 Feb 1995 16:35:26 EST
>
>System name: milanese
>Type and version: KN02ca 7.7G (1 update(s) to same version)
>Display type: rlogin from SUN Sparc 2
>
>What were you trying to do?
>
>y:=simplify(1/2*(int(int(Dirac(eta)*f(tau),eta=x-(t-tau)..x+(t-tau)),tau=0..t)>));
>aa:=(diff(y,t$2)-diff(y,x$2));
>What's wrong:
>
>It gives aa:=0.
>
>
>What should have happened:
>
>
>
>It should have given aa=Dirac(x)*f(t).
>If one puts g(eta,tau) instead of Dirac(eta)*f(tau) then the answer is the cor>rect one aa:=g(x,t).
>
>That is, Maple doesn't handle Dirac function properly.
>
>Please describe any relevant documentation references:
>
>
>
