Antwort: Simplifying things

• To: mathgroup at smc.vnet.net
• Subject: [mg26078] Antwort: [mg26070] Simplifying things
• From: Adalbert Hanssen <hanssen at Zeiss.de>
• Date: Tue, 28 Nov 2000 01:55:26 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

```Hi, try this:

expr=(1+Sqrt[(a-1)^2])^5+(1+1/Sqrt[(b-1)^2])^3;

Clear[x];
expr//. {(Sqrt[x_^2])->x, (1/Sqrt[x_^2])->1/x}

it gives

a^5 + (1 + (-1 + b)^(-1))^3

Note:
1.) Don't forget the parentheses around Sqrt in the
replacement rules.

2.) Usually, you need two rules, one for the numerator,
another one for a denominator, due to the different
internal representation of 1/Sqrt[x].

regards

djago at my-deja.com
22.11.00 08:23

An: mathgroup at smc.vnet.net@EMAIL
Thema: [mg26070] Simplifying things

Hi!
I need to simplify looooong equations, but don't know how to get rid of
those terms like:

Sqrt[a^2]

when a is a real positive variable... How can I tell Mathematica 3 to
simplify this?

Thanks!

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