Hi all,

sage: a=matrix(QQ,3,3,range(9))
sage: v=matrix(QQ,3,1,range(3))
sage: (latex(a\v), a)

gives an error.

I think it has to do with the parsing of latex(a\v); it seems to try 
doing "(latex(a._backslash_(v), a)" (note the missing parenthesis in the 
call to latex.

You see this more detailed error from:

@interact
def _(a=matrix(QQ,3,3,range(9)), v=matrix(QQ,3,1,range(3))):
     html('$$%s %s = %s$$'%(latex(a), latex(a\v), latex(v)))

with the patch from #3121 applied.

Does anyone know what is going on?

This error is tracked at http://trac.sagemath.org/sage_trac/ticket/3146

Thanks,

Jason


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