Yuan Jiu-yin
Abstract
The set of disunion and union of a family of a sets about cardinal number is discussed in this paper, shows that for a set A which Cardinal number is c,there exist a family of sets Ai,such that Where the cardinal number of all Ai and I is c. conversely fit is true.
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The set of disunion and union of a family of a sets about cardinal number is discussed in this paper, shows that for a set A which Cardinal number is c,there exist a family of sets Ai,such that Where the cardinal number of all Ai and I is c. conversely fit is true.
Key concepts: Cardinal number (linguistics), Regular cardinal, Mathematics, Set (abstract data type), Combinatorics, Discrete mathematics, Mathematical economics, Philosophy