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Types for Proofs and Programs, (2006)
On Constructive Existence
Michel Parigot 1
(2006)

Baaz and Fermueller gave in 2003 an original characterization of constructive existence in classical logic. In this paper, we give a simple proof of this result based on cut-elimination in sequent calculus. The interest of this proof besides its simplicity is that it allows in particular to generalize the result to other logics enjoying cut-elimination. We also briefly discuss the significance of the characterization itself.
1 :  Preuves, Programmes et Systèmes (PPS)
CNRS : UMR7126 – Université Paris VII - Paris Diderot
Mathématiques/Logique