automaton.coaccessible.ipynb

Kernel: Python 3

automaton.coaccessible

Create a new automaton from the coaccessible part of the input, i.e., the subautomaton whose states can be reach a final state.

Preconditions:

• None

Postconditions:

• Result.is_coaccessible

See also:

• automaton.is_coaccessible

• automaton.accessible

• automaton.trim

Examples

import vcsn

The following automaton has states that cannot be reach any final(s) states:

%%automaton a
context = "lal_char(abc), b"
$ -> 0
0 -> 1 a
1 -> $
2 -> 0 a
1 -> 3 a

a.is_coaccessible()

False

Calling coaccessible returns the same automaton, but without its non-coaccessible states:

a.coaccessible()

a.coaccessible().is_coaccessible()

True