Radical conjugates
- To: mathgroup at smc.vnet.net
- Subject: [mg129691] Radical conjugates
- From: Francisco Javier García Capitán <garciacapitan at gmail.com>
- Date: Mon, 4 Feb 2013 01:21:57 -0500 (EST)
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Hello, I wanted a function that takes a numerical expression of the form
a + b Sqrt[c]
or
a Sqrt[b] + c Sqrt[d]
and returns its conjugate, namely a - b Sqrt[c] and (a Sqrt[b] - c
Sqrt[d]) respectively.
I wrote
RadicalConjugate[x_] := Module[{c},
c = Cases[x, Power[_]];
If[Length[c] > 0, x /. c[[1]] -> -c[[1]], x]
]
and it seems that it works. Anyway, do you have a different approach?
Thank you.
--
---
Francisco Javier Garc=EDa Capit=E1n
http://garciacapitan.99on.com
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