Im looking for the cardinality of a Set where X is an element of the Real Numbers such that lxl = -1..... what's this mean ?!

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- January 27th 2009, 04:18 PMnikie1o2Cardinality of a Set
Im looking for the cardinality of a Set where X is an element of the Real Numbers such that lxl = -1..... what's this mean ?!

- January 27th 2009, 04:21 PMPlato
HINT: There is no real number such that

- January 27th 2009, 04:25 PMnikie1o2
- January 27th 2009, 04:33 PMPlato
Well, YES.