Hi, could anyone help me start off this proof:

Notation: For a set we define

Then show if for are sets then:

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- Oct 12th 2010, 09:39 AMskamoniSet Theory.
Hi, could anyone help me start off this proof:

Notation: For a set we define

Then show if for are sets then:

- Oct 12th 2010, 10:01 AMPlato
If then .

We are going to use that to define by .

So . - Oct 12th 2010, 11:09 AMskamoni
Thanks Plato, I think understand what you're saying but doesn't this only give ?

If so, how would I prove