(11steps total) PrintForm Definitions DiscreteMath Sections DiscrMathExt Doc
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At: nsub inj lop typing 1 1 2 2 1

1. a : 
2. b : 
3. f : ab
4. Inj(abf)
5. a1 : (a-1)
6. (a-1)
7. f(a1) = f(a-1)
  False


By: FwdThru: Hyp:4 on [ f(a1) = f(a-1)  b ]


Generated subgoals:

None

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

(11steps total) PrintForm Definitions DiscreteMath Sections DiscrMathExt Doc