Setting of gcd variable.

• Subject: Setting of gcd variable.
• From: Constantine Frangos
• Date: Tue, 7 Jun 2011 16:48:06 +0200

Dear List,

I am using ratsimp() and fullratsimp() for simplification with the setting of the variable gcd = spmod.

Any assistance with the following would be appreciated:

(1) In a recent posting by Stavros Macrakis, it seems that the settings spmod = red and spmod = subres
lead to cancellations in fractions, not obtainable with gcd = spmod.

Which setting is best for the case of expressions with complicated trigonometric terms ? 

What known  bugs/side-effects result for each possible value of spmod ?


(2) Are facts entered using the assume() function, explicitly used by all/some simplification functions ?

Thanks very much.
Regards,
Constantine Frangos.

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