(9steps total) PrintForm Definitions Lemmas SimpleMulFacts Sections DiscrMathExt Doc
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At: prime neg 2 1

1. x:. prime(-x prime(x)
2. y : 
3. prime(y)
  prime(-(-y))


By: Subst: -(-y) = y


Generated subgoals:

None

About:
intminusequalimpliesall
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(9steps total) PrintForm Definitions Lemmas SimpleMulFacts Sections DiscrMathExt Doc