Decidability of equality for NN+oo is equivalent to WLPO
#4476
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This is ifor from set.mm with a decidability condition added. The proof is similar to the set.mm proof with excluded middle replaced by the decidability condition.
Includes lemmas nninfwlpoimlemg , nninfwlpoimlemginf , and nninfwlpoimlemdc .
Biconditionalized form of nninfwlpor and nninfwlpoim .
icecream17
approved these changes
Dec 13, 2024
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The new part here is the forward implication which follows the proof at #4151 (comment)
Fixes #4151