Operators on automata

`*` [multiply](automaton.multiply.ipynb) Product (concatenation)
`&` [conjunction](automaton.conjunction.ipynb) Conjunction (synchronized product) and repeated conjunction
`+` [sum](automaton.sum.ipynb) Sum (disjunction)
`%` [difference](automaton.difference.ipynb) Difference
`-` [difference](automaton.difference.ipynb) Difference
`**` [power](automaton.multiply.ipynb) Repeated multiplication