Re: condition and pattern matching
- To: mathgroup at smc.vnet.net
- Subject: [mg44890] Re: condition and pattern matching
- From: bobhanlon at aol.com (Bob Hanlon)
- Date: Sat, 6 Dec 2003 04:45:28 -0500 (EST)
- References: <bqpnao$92b$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Simplify[expr, 0 < z < h]
Bob Hanlon
In article <bqpnao$92b$1 at smc.vnet.net>, "ram" <amli at comcast.net> wrote:
<< I would like to integrate the function from {0,h}.
\!\(\((E\^\(\(-I\)\ k\ Abs[\(-h\) + z]\)\/Abs[\(-h\) + z] +
E\^\(\(-I\)\ k\ Abs[h + z]\)\/Abs[h + z] -
\(2\ E\^\(\(-I\)\ k\ Abs[z]\)\ Cos[h\ k]\)\/Abs[z])\)\ Csc[h\ k]\^2\
Sin[k\ \((h - Abs[z])\)]\)
Is there any way that I can replace Abs function by its values? I know that
the following cases for condition matching work
fac[n_ /; n > 0] := n!
m /:Greater[m,n]=True;
fac[m]
gg[m_,n_]:=m-n /; m>n
u/:Greater[u,v]=True;
gg[u,v]
But I can not find a way to apply above ideas when expressions are
involved. Thanks for any help.