anchor.diff:  synthesis of implicit type arguments, relieving the user of tedious
   redundant declarations.
   
  -Christine Paulin wrote an article _Algorithm development in the
  -Calculus of Constructions_, preprint as Rapport de recherche INRIA
  -n°497, March 86.  Final version in Proceedings Symposium on Logic in
  -Computer Science, Cambridge, MA, 1986 (IEEE Computer Society
  -Press). Besides _lambo_ and _majority_, she presents quicksort and a
  -text formatting algorithm.
  +Christine Paulin wrote an article __Algorithm development in the
  +Calculus of Constructions__ <<P86>>. Besides _lambo_ and _majority_,
  +she presents quicksort and a text formatting algorithm.
   
   Version 2.13 of the Calculus of Constructions with universes was
   frozen on June 25th, 1986.
  
positive.code: ====
  September 2015 +
  Thierry Coquand, Gérard Huet and Christine Paulin-Mohring.
  ====
negative.code: been investigating how to add native inductive types to the Calculus
  of Constructions, in the manner of Per Martin-Löf's Intuitionistic
  Type Theory. The impredicative encoding had already been presented in:
  F. Pfenning and C. Paulin-Mohring. __Inductively defined types in the
  Calculus of Constructions__ <<PP90>>. An extension of the calculus
  with primitive inductive types appeared in: Th. Coquand and
  C. Paulin-Mohring. __Inductively defined types__ <<CP90>>.
  
  This led to the Calculus of Inductive Constructions, logical formalism
  implemented in Versions 5 upward of the system, and documented in:
  C. Paulin-Mohring. __Inductive Definitions in the System Coq - Rules
  and Properties__ <<P93>>.
  
  The last version of CONSTR is Version 4.11, which was last distributed
  in the spring of 1990. It was demonstrated at the first workshop of
  