Bases: sage.categories.category.Category
TESTS:
sage: TestSuite(DualityCategory()).run() # mostly to silence sage -coverage on this abstract class
Failure in _test_not_implemented_methods:
Traceback (most recent call last):
...
AssertionError: Not implemented method: dual
------------------------------------------------------------
The following tests failed: _test_not_implemented_methods
Returns the dual category
EXAMPLES:
sage: Algebras(QQ).dual()
Category of coalgebras over Rational Field