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/sci/ - Science & Math

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File: 113 KB, 600x928, 146417857.jpg [View same] [iqdb] [saucenao] [google]

8696243

Anonymous Thu Feb 23 01:01:09 2017 No.8696243 [Reply] [Original]

How do I prove that the union of subsets of a set A with A has the same cardinality as A?

>>	Anonymous Thu Feb 23 01:12:35 2017 No.8696269 >literally kindergarten math Define a bijection between them.

>>	Anonymous Thu Feb 23 09:30:26 2017 No.8696950 File: 18 KB, 222x258, elmono.jpg [View same] [iqdb] [saucenao] [google] >>8696269 how does one construct the mapping?