but "cryptomorphism" is only very distantly related to "isomorphism", "homomorphism", or "morphisms". The equivalence may in a cryptomorphism, if it...

is the size of a basis of X. Just as with matroids, greedoids have a cryptomorphism in terms of rank functions. A function r : 2 E → Z {\displaystyle r:2^{E}\to...

relation between structures of different signatures is sometimes called a cryptomorphism. A structure may be implemented within a set theory ZFC, or another...