Description: Lemma for pwfseq . Using the construction D from pwfseqlem1 , produce a function F that maps any well-ordered infinite set to an element outside the set. (Contributed by Mario Carneiro, 31-May-2015)
Ref | Expression | ||
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Hypotheses | pwfseqlem4.g | |
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pwfseqlem4.x | |
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pwfseqlem4.h | |
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pwfseqlem4.ps | |
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pwfseqlem4.k | |
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pwfseqlem4.d | |
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pwfseqlem4.f | |
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Assertion | pwfseqlem3 | |