
Re: 2 Assumptions for one parameter?
Posted:
Sep 12, 2012 3:03 AM


$Assumptions = { a > 0, Element[a, Reals], c < 0, Element[c, Reals]};
a::usage = ToString[Select[$Assumptions, ! FreeQ[#, a] &]];
?a
{a > 0, a \[Element] Reals}
However, $Assumptions are not automatically applied.
?$Assumptions
$Assumptions is the default setting for the Assumptions option used in such functions as Simplify, Refine, and Integrate. >>
Bob Hanlon
On Tue, Sep 11, 2012 at 2:32 AM, <"Andreas Talmon l'Arm=E9e"@smc.vnet.net> wrote: > Hi all, > > What is the right typing to make two assumptions for one parameter? > Something like this: > > $Assumptions={a>0&&Element[a,Reals]} > > And is there a way to to control my assumptions made for the parameters > I use something like > > ?a > > > Thanks, > > Andreas >

