expression
.complement
Create an expression which denotes the complement of this expression.
See also:
automaton.complement
import vcsn e = vcsn.B.expression('a*b') e.complement()
(a∗ b)c\left({a}^{*} \, b\right)^{c}(a∗b)c
e.complement().automaton()
e.automaton().complete().complement()