Editing Temporal logic (section)

{{Short description|System for representing and reasoning about time}}
In [[logic]], '''temporal logic''' is any system of rules and symbolism for representing, and reasoning about, propositions qualified in terms of [[time]] (for example, "I am ''always'' hungry", "I will ''eventually'' be hungry", or "I will be hungry ''until'' I eat something"). It is sometimes also used to refer to '''tense logic''', a [[modal logic]]-based system of temporal logic introduced by [[Arthur Prior]] in the late 1950s, with important contributions by [[Hans Kamp]]. It has been further developed by [[computer scientists]], notably [[Amir Pnueli]], and [[logician]]s.

Temporal logic has found an important application in [[formal verification]], where it is used to state requirements of hardware or software systems. For instance, one may wish to say that ''whenever'' a request is made, access to a resource is ''eventually'' granted, but it is ''never'' granted to two requestors simultaneously. Such a statement can conveniently be expressed in a temporal logic.