mlsubsection23.25ex plus 1ex minus .2ex1.5ex plus .2ex
 product_equality(y): tok 
  rule.
universe_intro_product_independent: rule.
product_equality_independent: rule.
mlsubsection23.25ex plus 1ex minus .2ex1.5ex plus .2ex
 product_equality_pair(level y): int 
  tok 
  rule.
product_intro: rule.
product_equality_pair_independent: rule.
mlsubsection23.25ex plus 1ex minus .2ex1.5ex plus .2ex
 product_equality_spread(over_id over using u v):
tok 
  term 
  term 
  tok 
  tok 
  rule.
mlsubsection23.25ex plus 1ex minus .2ex1.5ex plus .2ex