4.
We engage a study of nonmodal linear logic which takes times ⊗ and the linear conditional ⊸ to be the basic connectives instead
of times and linear negation ()
⊥ as in Girard's approach. This difference enables us to obtain a very large subsystem of linear logic (called positive linear
logic) without an involutionary negation (if the law of double negation is removed from linear logic in Girard's formulation,
the resulting subsystem is extremely limited). Our approach enables us to obtain several natural models for various subsystems
of linear logic, including a generic model for the so-called minimal linear logic. In particular, it is seen that these models
arise spontaneously in the transition from set theory to multiset theory. We also construct a model of full (nonmodal) linear
logic that is generic relative to any model of positive linear logic. However, the problem of constructing a generic model
for positive linear logic remains open. Bibliography: 2 titles.
Published in
Zapiski Nauchnykh Seminarov POMI, Vol. 220, 1995, pp. 23–35. Original
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