(4steps total) PrintForm Definitions Lemmas DiscreteMath Sections DiscrMathExt Doc
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At: nsub add 1

1. c : 
2. a : 
3. b : 
4. a+b = c
  (a+b) ~ c


By: Rewrite by b ~ {a..c}


Generated subgoals:

1   b ~ {a..c}
1 step
2   (a+{a..c}) ~ c
1 step

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

(4steps total) PrintForm Definitions Lemmas DiscreteMath Sections DiscrMathExt Doc