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2018 | OriginalPaper | Buchkapitel

Uniform Substitution for Differential Game Logic

verfasst von : André Platzer

Erschienen in: Automated Reasoning

Verlag: Springer International Publishing

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Abstract

This paper presents a uniform substitution calculus for differential game logic ( https://static-content.springer.com/image/chp%3A10.1007%2F978-3-319-94205-6_15/464406_1_En_15_IEq1_HTML.gif ). Church’s uniform substitutions substitute a term or formula for a function or predicate symbol everywhere. After generalizing them to differential game logic and allowing for the substitution of hybrid games for game symbols, uniform substitutions make it possible to only use axioms instead of axiom schemata, thereby substantially simplifying implementations. Instead of subtle schema variables and soundness-critical side conditions on the occurrence patterns of logical variables to restrict infinitely many axiom schema instances to sound ones, the resulting axiomatization adopts only a finite number of ordinary https://static-content.springer.com/image/chp%3A10.1007%2F978-3-319-94205-6_15/464406_1_En_15_IEq2_HTML.gif formulas as axioms, which uniform substitutions instantiate soundly. This paper proves soundness and completeness of uniform substitutions for the monotone modal logic https://static-content.springer.com/image/chp%3A10.1007%2F978-3-319-94205-6_15/464406_1_En_15_IEq3_HTML.gif . The resulting axiomatization admits a straightforward modular implementation of https://static-content.springer.com/image/chp%3A10.1007%2F978-3-319-94205-6_15/464406_1_En_15_IEq4_HTML.gif in theorem provers.

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Fußnoten
1
The addition of games to the previous https://static-content.springer.com/image/chp%3A10.1007%2F978-3-319-94205-6_15/464406_1_En_15_IEq23_HTML.gif prover was more complex [10], with an implementation effort measured in months not minutes. Unfortunately, this is not quite comparable, because both provers implement markedly different flavors of games for hybrid systems. The game logic for https://static-content.springer.com/image/chp%3A10.1007%2F978-3-319-94205-6_15/464406_1_En_15_IEq24_HTML.gif [10] was specifically tuned as an exterior extension to be more easily implementable than https://static-content.springer.com/image/chp%3A10.1007%2F978-3-319-94205-6_15/464406_1_En_15_IEq25_HTML.gif in https://static-content.springer.com/image/chp%3A10.1007%2F978-3-319-94205-6_15/464406_1_En_15_IEq26_HTML.gif .
 
2
Even if not critical here, differentials have a differential-form semantics [6] as the sum of all partial derivatives by https://static-content.springer.com/image/chp%3A10.1007%2F978-3-319-94205-6_15/464406_1_En_15_IEq137_HTML.gif multiplied by the corresponding values of https://static-content.springer.com/image/chp%3A10.1007%2F978-3-319-94205-6_15/464406_1_En_15_IEq138_HTML.gif :
https://static-content.springer.com/image/chp%3A10.1007%2F978-3-319-94205-6_15/464406_1_En_15_IEq139_HTML.gif .
 
3
A logic L closed under first-order connectives is differentially expressive (for https://static-content.springer.com/image/chp%3A10.1007%2F978-3-319-94205-6_15/464406_1_En_15_IEq645_HTML.gif ) if every https://static-content.springer.com/image/chp%3A10.1007%2F978-3-319-94205-6_15/464406_1_En_15_IEq646_HTML.gif formula \(\phi \) has an equivalent https://static-content.springer.com/image/chp%3A10.1007%2F978-3-319-94205-6_15/464406_1_En_15_IEq648_HTML.gif in L and all differential equation equivalences of the form https://static-content.springer.com/image/chp%3A10.1007%2F978-3-319-94205-6_15/464406_1_En_15_IEq649_HTML.gif for G in L are provable in its calculus.
 
Literatur
2.
Zurück zum Zitat Church, A.: Introduction to Mathematical Logic. Princeton University Press, Princeton (1956)MATH Church, A.: Introduction to Mathematical Logic. Princeton University Press, Princeton (1956)MATH
8.
Zurück zum Zitat Platzer, A.: Uniform substitution for differential game logic. CoRR abs/1804.05880 (2018) Platzer, A.: Uniform substitution for differential game logic. CoRR abs/1804.05880 (2018)
11.
Zurück zum Zitat Tarski, A.: A Decision Method for Elementary Algebra and Geometry, 2nd edn. University of California Press, Berkeley (1951)MATH Tarski, A.: A Decision Method for Elementary Algebra and Geometry, 2nd edn. University of California Press, Berkeley (1951)MATH
Metadaten
Titel
Uniform Substitution for Differential Game Logic
verfasst von
André Platzer
Copyright-Jahr
2018
DOI
https://doi.org/10.1007/978-3-319-94205-6_15