free symbols in symbolic expression
s: FreeSymbols( e )
symbolic expression
set of symbols
Returns a set s of all free symbols in expression e.
// expression e = %(Sym("f(x,y)+3*z/y+g(z)")) // free symbols in epression e FreeSymbols(e) // clean up free(e); clear e;
SymEngine: C++ library for fast symbolic manipulation.