Organizatorzy

prof. dr hab. Mikołaj Bojańczyk
prof. dr hab. Damian Niwiński

Informacje

środy, 14:15 , sala: 5440

Dziedziny badań

Lista referatów

29 stycznia 2014 14:15
Denis Kuperberg (Uniwersytet Warszawski)
Regular Sensing (joint work with Shaull Almagor and Orna Kupferman)
The size of deterministic automata required for recognizing regular and omega-regular languages is a well-studied measure for the complexity of languages. We introduce and study a new complexity measure, based on the sensing required for …
22 stycznia 2014 14:15
Achim Blumensath (Technische Universität Darmstadt)
Recognisability and Algebras of Infinite Trees
In this talk I give an overview of an algebraic language theory for languages of infinite trees based on algebras called omega-hyperclones. Recognisability with respect to these algebras has the same expressive power as tree …
15 stycznia 2014 14:15
Mikołaj Bojańczyk (Uniwersytet Warszawski)
Weak MSO+U with path quantifiers
Over infinite trees, satisfiability is decidable for weak monadic second-order logic extended by the unbounding quantifier U and quantification over infinite paths. The proof is by reduction to emptiness for a certain automaton model, while …
8 stycznia 2014 14:15
Eryk Kopczyński (Uniwersytet Warszawski)
Infinite sets in practice
We present a C++ library allowing computation over infinite sets. The programmer is able to represent infinite sets (in finite memory), as well as loop over them (in finite time). The elements of these sets …
18 grudnia 2013 14:15
Paweł Parys (Uniwersytet Warszawski)
Two-Way Cost Automata and Cost Logics over Infinite Trees (joint work with Achim Blumensath, Thomas Colcombet, Denis Kuperberg and Michael Vanden Boom)
This work is a step towards solving regular cost functions on infinite trees (which is already done for words - finite and infinite - and for finite words).We consider cost functions over infinite trees defined …
11 grudnia 2013 14:15
Michał Skrzypczak (Uniwersytet Warszawski)
Harrington's game and measurability of regular tree languages (joint work with Tomasz Gogacz, Henryk Michalewski and Matteo Mio)
I will present some investigations on measure properties of regular tree languages. The motivation for this research comes from the dissertation of Matteo Mio. I plan to focus on two aims: the first aim is …
4 grudnia 2013 14:15
Denis Kuperberg (Uniwersytet Warszawski)
Nondeterminism in the Presence of a Diverse or Unknown Future (joint work with Udi Boker, Orna Kupferman, Michał Skrzypczak)
One of the advantages of deterministic automata is that they composewell with trees and games. In the theory of cost functions, suchdeterministic automata are not always available, so a weaker notionwas introduced: history-deterministic automata, which …
27 listopada 2013 14:15
Adam Witkowski (Uniwersytet Warszawski)
Regular Tree Pattern Queries and Datalog
Regular Tree Pattern Queries (RTPQ) are queries for data trees that were defined during a research on Active XML.We found that this formalism is interesting on its own and closely connected to Datalog.I will talk …
20 listopada 2013 14:15
Thomas Colcombet (LIAFA, Université Paris 7)
Regular Cost-Functions and Internal Set Theory (continuation)
We will show how to solve cost-MSO over finite words, paying a particular attention to the use of the non-standard aspect of Internal Set Theory.
13 listopada 2013 14:15
Thomas Colcombet (LIAFA, Université Paris 7)
Regular Cost-Functions and Internal Set Theory
In this talk, I will take as an excuse regular cost-functions (an extension of regular languages with quantitative capabilities) for presenting "Internal Set Theory" (IST), an axiomatic extension of ZFC that has native non-standard analysis …
6 listopada 2013 14:15
Paweł Parys (Uniwersytet Warszawski)
Asymptotic MSO and lossy tiling problems (joint work with Achim Blumensath and Thomas Colcombet)
I will talk about a new extension of the MSO logic in the style of MSO+U, which is called Asymptotic MSO. This logic refers to structures (in particular omega-words) whose elements are weighted with natural …
30 października 2013 14:15
Matteo Mio (CWI - Amsterdam)
Game Semantics for Probabilistic mu-Calculi
In this talk I will consider (a family of) probabilistic (or quantitative) variants of Kozen's Modal mu-Calculus, designed for expressing properties of probabilistic-nondeterministic transition systems. Two type of semantics can be defined for these logics: …
23 października 2013 14:15
Matteo Mio (CWI - Amsterdam)
Foundations of Quantitative Logics based on Functional Analysis
Several notions of bisimulation relations for Probabilistic Nondeterministic Transition Systems (PNTS's) have been proposed in the literature. I will develop the theory of what I call "Upper-Expectation bisimilarity" using standard results of linear algebra and …
16 października 2013 14:15
Teodor Knapik (joint work with Didier Caucal) (University of New Caledonia)
Two MSO-compatible operations: Shelah-Stupp's iteration and Muchnik's iteration
In the early seventies, Shelah proposed a model-theoretic construction,nowadays called "iteration". This construction is an infinitereplication in a tree-like manner where every vertex possesses its owncopy of the original structure. Stupp proved that the decidability …
19 czerwca 2013 14:15
Aleksander Zabłocki (Uniwersytet Warszawski)
Squeezing theory into practice: automata in natural language processing
I will sketch some aspects of using automata in natural language processing: more precisely, in efficient applying a set of search-replace rules for richly annotated text. Although this might seem trivial (build-determinize-compose-run), our practical applications …