A collection of TLA+ modules about operators
for defining open-systems.

Modules describing the semantics of
relevant temporal logics precede those modules that pertain to
stepwise implication operators.

The latter modules contain theorems
that express the operators WhilePlus, WhilePlusHalf, and Unzip
in raw TLA+.

A definition of realizability follows, and a module on the effect of
hiding history-determined variables on realizability.


This document accompanies the dissertation available at:

http://resolver.caltech.edu/CaltechTHESIS:07202018-115217471
