In CTL *, the temporal operators can be freely mixed.
2.
Sequences consist of boolean expressions augmented with temporal operators.
3.
The simplest temporal operator is the # # operator which performs a concatenation:
4.
TLC operates on a subset of TLA +; the model must be finite and enumerable, and some temporal operators are not supported.
5.
PSL's temporal operators can be roughly classified into " LTL-style " operators and " regular-expression-style " operators.
6.
The operators basically are the same as in CTL . However, in CTL, every temporal operator ( X, F, G, U ) has to be directly preceded by a quantifier, while in CTL * this is not required.
7.
The binary temporal operators " Since " and " Until " were introduced by Hans Kamp in his 1968 Ph . D . thesis, which also contains an important result relating temporal logic to first order logic a result now known as Kamp's theorem.
8.
Such systems can be based on logics more complicated than simple propositional epistemic logic, see Wooldridge " Reasoning about Artificial Agents ", 2000 ( in which he uses a first-order logic incorporating epistemic and temporal operators ) or van der Hoek et al . " Alternating Time Epistemic Logic ".
9.
According to the formal definition of veridicality for temporal operators, future is nonveridical : that " John will buy a bottle of Merlot " is true " now " does not entail that " John buys a bottle of Merlot " is true at any instant up to and including " now ".
10.
Rax has temporal operators for time ( e . g . noon may 1st ), absolute durations ( e . g . a week ), relative duration ( e . g . a month ), and time interval ( e . g . today form dusk till dawn ), making it much easier to express temporal calculations.
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