Least and Greatest Fixed Points in Linear Logic [article]

David Baelde
2010 arXiv   pre-print
The first-order theory of MALL (multiplicative, additive linear logic) over only equalities is an interesting but weak logic since it cannot capture unbounded (infinite) behavior. Instead of accounting for unbounded behavior via the addition of the exponentials (! and ?), we add least and greatest fixed point operators. The resulting logic, which we call muMALL, satisfies two fundamental proof theoretic properties: we establish weak normalization for it, and we design a focused proof system
more » ... we prove complete. That second result provides a strong normal form for cut-free proof structures that can be used, for example, to help automate proof search. We show how these foundations can be applied to intuitionistic logic.
arXiv:0910.3383v4 fatcat:3znfpcjtd5e5rfoffvxkltibyq