Re: Modifying arguments of sub-parts of an expression
- To: mathgroup at smc.vnet.net
- Subject: [mg38858] Re: Modifying arguments of sub-parts of an expression
- From: Tom Burton <tburton at brahea.com>
- Date: Thu, 16 Jan 2003 03:20:07 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
Hello,
Let
expr = 10*Gamma[a]*Gamma[3 + b]^2*(2*Gamma[1 + a]^2*Gamma[4 +
b]*Gamma[3 + a + b]*Gamma[a]*Gamma[3 + b]*Gamma[4 + a + b])/(
Beta[a, b]^3*Gamma[3 + a + b]^2*Gamma[4 + a + b]*Gamma[5 + a + b])
One way to replace b by 1+b inside arguments to Gamma is the following rule
within a rule:
gr = Gamma[args__] :> Gamma[args /. b -> 1+b]
Then
expr /. gr
seems to do what you want. By the way, if your examples included nested
Gamma functions, then you'll want instead
expr //. gr
Tom Burton