RE: Simplification with constraints
- To: mathgroup at smc.vnet.net
- Subject: [mg72060] RE: [mg72040] Simplification with constraints
- From: "David Park" <djmp at earthlink.net>
- Date: Sun, 10 Dec 2006 04:49:13 -0500 (EST)
Vladimir,
What about
Eliminate[{expr == b*b + c*c + d*d, a*a + b*b + c*c + d*d == 1}, d]
expr == 1 - a^2
David Park
djmp at earthlink.net
http://home.earthlink.net/~djmp/
From: Vladimir [mailto:vladimir347 at yahoo.com]
Suppose we have a constraint:
a*a+b*b+c*c+d*d==1
What is the most elegant and general way to simplify any expression
considering above constraint for simplification?
For (just a simple) example:
In[]:=simplify[b*b+c*c+d*d]
should give:
Out[]=1-a*a
--
thanks in advance,
Vladimir