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Topic: Delta functions.
Replies: 14   Last Post: Apr 22, 2013 8:58 AM

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A N Niel

Posts: 2,245
Registered: 12/7/04
Re: Delta functions.
Posted: Apr 22, 2013 8:58 AM
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In article <kl1n2l$oo$1@z-news.wcss.wroc.pl>, Waldek Hebisch
<hebisch@math.uni.wroc.pl> wrote:

> From Maple:
>

> > simplify((Dirac(x)^2 - 1)/(Dirac(x) - 1)) ;
> Dirac(x) + 1
>
> As you see Maple has no objections to taking square of delta
> function and to dividing by a distribution.
>


Actually, your conclusion is wrong. This has nothing to do with the
Dirac delta function......

> simplify((f(x)^2-1)/(f(x)-1));
f(x) + 1

The simplification is done before the function evaluation is considered.



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