Huge lower bounds of weak logics for data words

Speaker(s)

Diego Figueira

Affiliation

Laboratoire Spécification et Vérification (LSV)

Date

Oct. 28, 2009, 2:15 p.m.

Room

room 5870

Seminar

Seminar Automata Theory

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I will show how to code very hard problems into the satisfiability of the linear temporal logic (LTL) equipped with one register to store and test data values from positions of a data word. I will show that this lower bound holds even when there only navigational modality is the Future. I will mention some of the consequences this entails for the satisfiability of some fragments of XPath over XML documents. Joint work with Luc Segoufin.

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