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Re: Persistent assumption

  • To: mathgroup at smc.vnet.net
  • Subject: [mg106071] Re: [mg106019] Persistent assumption
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Thu, 31 Dec 2009 03:20:33 -0500 (EST)
  • Reply-to: hanlonr at cox.net

$Assumptions = {x > 0};

Simplify[Sqrt /@ {x^2, y^2}]

{x, Sqrt[y^2]}

$Assumptions =.


Bob Hanlon

---- Sam Takoy <samtakoy at yahoo.com> wrote: 

=============
Hi,

Is it possible to make an Assumption for the duration of a block of 
code? In other words, to say "In all of the following code, Assume[x>0]".

I appreciate that it is possible to use,

Assuming[x>0,

a whole lot of code

]

but that's quite awkward. Looking for a better alternative.

Thanks,

Sam



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