Is there a subtraction operation defined for infinities of the cardinality C?
Yeah. There's no well posed subtraction that doesn't create holes in one it seems
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"For any infinite sets A and B, if there is an injection from A to B then there is an injection from subsets of A to subsets of B" - or as my math friend says - it depends on your assumptions and definitions :)
Thanks. Twitter will use this to make your timeline better. UndoUndo
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