Option variable
letrat
Default value: false
When letrat
is false
, letsimp
simplifies the
numerator and denominator of a ratio separately,
and does not simplify the quotient.
When letrat
is true
,
the numerator, denominator, and their quotient are simplified in that order.
(%i1) matchdeclare (n, true)$ (%i2) let (n!/n, (n-1)!); n! (%o2) -- --> (n - 1)! n (%i3) letrat: false$ (%i4) letsimp (a!/a); a! (%o4) -- a (%i5) letrat: true$ (%i6) letsimp (a!/a); (%o6) (a - 1)!