ulkb.Theory.lookup_theorem

Theory.lookup_theorem(arg, default=<class 'ulkb.util.Nil'>)

Searches for theorem.

If default is given, returns it instead of raising an exception.

Parameters:

• arg – Id or Constant.

• default – Value.

Returns:

Sequent.

Raises:

LookupError – arg not in theory.

See also

lookup_theorem().