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CODICI DI CHIUSURA DEI CIRCUITI MATROIDI (CODICI PER SAGE):

ESECUZIONE:

sage: from sage.matroids.advanced import *

ESEMPIO(1):

sage: from sage.matroids.advanced import *
sage: M1 = CircuitClosuresMatroid(groundset='abcdef',
....:                 circuit_closures={2: ['abc', 'ade'], 3: ['abcdef']})
sage: M2 = Matroid(circuit_closures={2: ['abc', 'ade'], 3: ['abcdef']})
sage: M3 = Matroid(circuit_closures=[(2, 'abc'),
....:                                (3, 'abcdef'), (2, 'ade')])
sage: M1 == M2
True
sage: M1 == M3
True

ESEMPIO(2):

sage: from sage.matroids.advanced import *
sage: M = CircuitClosuresMatroid(groundset='abcdef',
....:                 circuit_closures={2: ['abc', 'ade'], 3: ['abcdef']})
sage: isinstance(M.contract('a'), MinorMatroid)
True
sage: isinstance(M.dual(), DualMatroid)
True

TESTI:

sage: from sage.matroids.advanced import *
sage: M = CircuitClosuresMatroid(matroids.named_matroids.Fano())
sage: TestSuite(M).run()