antisymmetric tensor

Maybe tellsimpafter will work:

 (%i1) declare (eps3, antisymmetric)$

 (%i2) tellsimpafter(eps3[1,2,3],1)$

 (%i3) [eps3[1,2,3], eps3[2,1,3]];
 (%o3) [1,-1]

Barton

-----maxima-bounces at math.utexas.edu wrote: -----


>If?I?define?the?completely?antisymmetric?unit?tensor?in?3d
>via
>
>(%i1)?display2d:false$
>(%i2)?declare?(eps3,?antisymmetric)$
>(%i3)?eps3[1,2,3]?:?1$
>
>then?I?get
>
>(%i4)?eps3[1,2,3];
>(%o4)?1
>(%i5)?eps3[3,1,2];
>(%o5)?eps3[1,2,3]
>(%i6)?ev?(%);
>(%o6)?1
>(%i7)?a*eps3[1,2,3]?+?b*eps3[3,1,2]?+?c*eps3[2,3,1];
>(%o7)?eps3[1,2,3]*c+eps3[1,2,3]*b+a
>(%i8)?ev(%);
>(%o8)?c+b+a
>
>What?can?I?add?to?my?definition?lines?which?will?avoid?having?to
>always?use??"??ev?(stuff)??"?to?get?the?numerical?values??
>
>Thanks?in?advance
>
>Ted?Woollett
>
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