Path: news.mathworks.com!newsfeed-00.mathworks.com!solaris.cc.vt.edu!news.vt.edu!news.glorb.com!postnews.google.com!e21g2000vbz.googlegroups.com!not-for-mail
From: "Dr.K" <kananipour@gmail.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: derivative of (Dirac delta function)
Date: Fri, 1 Jul 2011 06:39:36 -0700 (PDT)
Organization: http://groups.google.com
Lines: 11
Message-ID: <1fa331d3-63fd-465c-abcc-d21f6a535756@e21g2000vbz.googlegroups.com>
References: <dc1cdc58-f910-4863-a9c1-7df889612857@q12g2000prb.googlegroups.com>
 <iug40b$mhq$1@newscl01ah.mathworks.com>
NNTP-Posting-Host: 94.182.0.34
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
X-Trace: posting.google.com 1309527697 13310 127.0.0.1 (1 Jul 2011 13:41:37 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Fri, 1 Jul 2011 13:41:37 +0000 (UTC)
Complaints-To: groups-abuse@google.com
Injection-Info: e21g2000vbz.googlegroups.com; posting-host=94.182.0.34; posting-account=-esYxQoAAAD-lTWOVH66nF0tX5yXoFss
User-Agent: G2/1.0
X-Google-Web-Client: true
X-Google-Header-Order: HUALESNKRC
X-HTTP-UserAgent: Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20100101 Firefox/5.0,gzip(gfe)
Xref: news.mathworks.com comp.soft-sys.matlab:734551

thank you Mr. Roger
your comment was useful, any way i had to find numerical solution for
firs order derivative of pn respect to x where pn is:
pn=dirac(x-f*t)*cos(x-F/2)
we know:
integral(f(x)*dirac(x-f*t),x)=f(f*t); and
integral(f(x)*dirac'(x-f*t),x)=-f'(f*t); and
pn'=dirac'(x-f*t)*cos(x-F/2)-dirac(x-f*t)*sin(x-F/2);
so:
pn'=0
and it's not correct!