(7steps total) PrintForm Definitions Lemmas SimpleMulFacts Sections DiscrMathExt Doc
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At: nat prod one iff factors one 1

1. x : 
2. y : 
3. xy = 1
  y = 1


By: Inst: Thm*  a,b:ab = 0  a = 0 & b = 0 Using:[x | y]


Generated subgoal:

1 4. x = 0
5. y = 0
  y = 1

2 steps

About:
intnatural_numbermultiplyequalimpliesandall
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html

(7steps total) PrintForm Definitions Lemmas SimpleMulFacts Sections DiscrMathExt Doc