PDF | On Dec 9, , Tarek Nabhani and others published Symétries locales et globales en logique propositionnelle et leurs extensions aux. Pour représenter les propriétés à vérifier, une logique multi-modale a été choisi: la Logique Propositionnelle Dynamique (PDL). Cette logique. Index of /geta/User/ Pascal_Lafourcade. [ICO], Name · Last modified · Size · Description.

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Formule propositionnelle

This situation, paired with an extensive use of the three-dimensional space, make them difficult to represent with tools already existent in Natural Language Processing NLP of vocal languages. With the PDLSL, body articulators like the hands or head are interpreted as independent agents; each articulator has its own set of valid actions and propositions, and executes them without influence from the others.

On the same vein, this may not only increase the size of the available datasets, but even extend previous results to new corpora; the framework inserts an intermediate representation layer which can serve to model any corpus, regardless of its technical limitations.

A multi-modal logic was chosen as the basis of the formal language: Logiqye main idea is that corpora can be described with a specialized Labeled Transition System LTSwhich can then be annotated with logic formulae for its study. Afterwards, a formal verification algorithm may be able to find those features in corpora, as long as they are represented as consistent LTSs.


Using formal logic to represent sign language phonetics in semi-automatic annotation tasks. In particular, PDL uses the modal operators [a] and to denote necessity and possibility, respectively. Friday, October 26, – 4: Have you forgotten your login?

For this reason, the current work presents the development of a formal representation framework, intended to transform SL video repositories corpus into an intermediate representation layer, where automatic recognition algorithms can work under better conditions.

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Картинки: Logique propositionnelle

For SLs, a particular variant based on the original formalism was developed: The final product, is an automatically generated sub-lexical annotation, which can be later corrected by human annotators for their use in other areas such as linguistics. This logic was originally created to specify and prove properties on computer programs.

Finally, the development of the formal framework led to the creation of a semi-automatic annotator based on the presented theoretical principles. With this, annotations is possible by defining with formulae the characteristics to annotate.

Together, the use of PDLSL and the proposed specialized data structures could help curb some of the current problems in SL study; notably the heterogeneity of corpora and the lack of automatic annotation aids.


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Les LS sont de langues naturelles, qui utilisent des gestes et l’espace autour du signeur pour transmettre de l’information.

However, unlike these, SL morphemes correspond to complex sequences of highly specific body postures, interleaved with postural changes: Propositionnel,e thesis presents a formal framework for the representation of Signed Languages SLsthe porpositionnelle of Deaf communities, in semi-automatic recognition tasks.

SLs are complex visio-gestural communication systems; by using corporal gestures, signers achieve the same level of expressivity held by sound-based languages like English or French.

Monday, June 20, – Traitement automatique du langage naturel Annotation automatique Langue des signes Logique propositionnelle dynamique. The proposiionnelle execution of different actions by several articulators yield distinct situations, which can be searched over an LTS with formulae, by using the semantic rules of the logic.

De ce fait, un chercheur peut rendre exploitables des corpus existants en les transformant vers des STE.