Subversion Repositories wimsdev

# Standardized zero (equation) checker. No approximation is allowed.
# Input are lines.
# Output are lines, in $out.

I__=!nonempty lines $wims_read_parm
tvars__=!varlist $I__
tvars__=!lower $tvars__
tvars__=!listintersect $tvars__ and \
        cos,sin,tan,tg,ctan,ctg,sec,csc,cosh,sinh,tanh,ch,sh,th
!if $tvars__!=$empty
  I__=!replace internal $\
$ by ))\
trigreduce(trigsimp( in trigreduce(trigsimp($I__))
!endif

n__=!linecnt $I__
!reset out,p__
!for i__=1 to $n__
  l__=!line $i__ of $I__
  p__=!append line if $maximasimp($l__)=0 then "yes" else "no"; to $p__
!next i__

out=!exec maxima $p__
out=!replace internal " by $ in $out