Numération 2011

Liège, 6th-10th June 2011

Liege poster

University of Liège
Department of Mathematics
Grande Traverse 12 (B37)
B-4000 Liège, Belgium

With the financial support of F.R.S-FNRS (National Funds for Research) and the University of Liège


Special issue of INTEGERS dedicated to the conference,
deadline for submitting a paper in the scope of the conference: 15th November 2011.
Send a pdf file by e-mail to M.Rigo.

Scientific Program

The goal of this conference is to bring together researchers interested in numeration systems from various points of view. This includes geometric aspects (fractals, tilings, quasi-crystals), dynamical/probabilistic aspects (odometers, subshifts), analytic aspects (related arithmetical functions), topological aspects (compactifications and applications), and computer science (automata, languages). The conference follows a series of events organized by the ``groupe d'étude sur la numération'' and is intended as a continuation of the ``Journées Numération, Pavages, Substitutions'' held in Grenoble in March 2005, ``Journées de Numération (Zö'tåg' in Graz)'' held in Graz in April 2007, ``Journées Numération'' in Prague Czech Technical University in May 2008, ``Numeration: Mathematics and Computer Science'' held in CIRM Marseille in March 2009 and recently ``Numeration'' held at the Lorentz Center in Leiden in June 2010.

Topics of the Conference

Invited Speakers (Instructional lectures)

an extra talk on Cobham's theorem for substitutions given by Fabien Durand, LAMFA, Amiens

Scientific Committee

Schedule

Contributed talks are welcome. You can submit a proposal (dealine April 30, 2011) in form of an extended abstract (4 to 6 pages in a pdf file). Simply send your abstract by e-mail. The scientific committee will check the relevance of the submissions with the topics of the conference and some selection could be made depending on the total number of submissions.

All talks will be given in lecture hall 02 (amphitéatre 02), directly on the left when you enter the building through the main entrance. Also room 0/33, on the same floor can be used as a working room for the participants of the conference.

Monday, 6th June
9.30-10.45 C. Kraaikamp, A Zoo of Continued Fraction Expansions Part 1: "flipped" expansions
10.45-11.15 Coffee Break
11.15-12.30 Y. Bugeaud
12.30-14.00 Lunch
14.00-14.25 F. Durand, G. Richomme, J. Leroy, Some examples and counter-examples about the S-adic conjecture
14.25-14.50 M. Edson, On representations of integers in the m-bonacci base
14.50-15.15 E. Charlier, N. Rampersad, J. Shallit, Enumeration and decidable properties of automatic sequences
15.15-15.45 Coffee break
15.45-16.10 A. C. Lai, Expansions in complex bases
16.10-16.35 C. Frougny, E. Pelantova, M. Svobodova, Parallel addition in non-standard numeration systems
16.35-16.45 Break
16.45-17.10 D. Dombek, Z. Masáková, Expansions of numbers in a negative base
17.10-17.35 T. Vavra, Number systems with negative quadratic base
17.35-18.00 A. Bertrand, How to write relative integers in a negative real bases
18.00- Welcome Party


Tuesday, 7th June
9.30-10.45 Y. Bugeaud
10.45-11.15 Coffee Break
11.15-12.30 C. Kraaikamp, A Zoo of Continued Fraction Expansions Part 2: alpha-expansions
12.30-14.00 Lunch
14.00-15.15 J. Thuswaldner, Shift Radix Systems I
15.15-15.45 Coffee Break
15.45-16.10 M. Roux, B. Vallée, Information theory: sources, Dirichlet series, and realistic analysis
16.10-16.35 D. Krenn, C. Heuberger, Analysis and optimality of the width-w non-adjacent form to imaginary quadratic bases
16.35-16.45 Break
16.45-17.10 M. Madritsch, Extremely non-normal numbers with respect to fibred systems
17.10-17.35 A. Pethö, P. Varga, CNS polynomials over imaginary quadratic Euclidean rings


Wednesday, 8th June
9.30-10.45 B. Boigelot, Automata-based Data Structures for Representing Sets of Vectors
10.45-11.15 Coffee Break
11.15-12.30 J. Thuswaldner, Shift Radix Systems II
12.30-14.00 Lunch
14.00-15.15 C. Kraaikamp, A Zoo of Continued Fraction Expansions Part 3: Subtractive algorithms
15.15-15.45 Coffee Break
15.45-16.10 V. Komornik, A. C. Lai, M. Pedicini, Generalized golden ratios of ternary alphabets
16.10-16.35 B. Rittaud, Circular words, F-adic numbers and the sequence 1, 5, 16, 45, 121, 320, ...
16.35-16.45 Break
16.45-17.10 S. Akiyama, V. Komornik, Discrete spectra generated by polynomials
17.10-17.35 H. Brunotte, S. Akiyama, Primitive matrices over polynomial semirings
17.35-18.00 O. Karpenkov, Klein polyhedra and its Gauss-Kuzmin statistics


Thursday, 9th June
9.30-10.45 Y. Bugeaud
10.45-11.15 Coffee Break
11.15-12.30 F. Durand
12.30-14.00 Lunch
14.00-15.15 B. Boigelot, Automata-based Data Structures for Representing Sets of Vectors
15.15-15.45 Coffee Break
15.45-16.10 P. Kurka, Stern-Brocot tree in Moebius number systems
16.10-16.35 DoYong Kwon, Ordered orbits of the $\beta$-transformations, and a devil's slope
16.35-16.45 Break
16.45-17.10 C. Bonanno, C. Carminati, S. Isola, G. Tiozzo, Dynamics of continued fractions and kneading sequences of unimodal maps
17.10-17.35 S. Livne, interrelation between shift radix systems and geometric continued fractions
17.35-18.00 P. Surer, Coding of substitution dynamical systems
18.00- Barbecue


Friday, 10th June
9.30-10.45 J. Thuswaldner, Shift Radix Systems III
10.45-11.15 Coffee Break
11.15-12.30 B. Boigelot, Implicit Real Vector Automata
12.30-14.00 Lunch
14.00-14.25 J.-L. Verger-Gaugry, On the Rényi-Parry numeration dynamical system and a germ of curve
14.25-14.50 E. Charlier, A. Lacroix, N. Rampersad, Multi-dimensional sets recognizable in all abstract numeration systems
14.50-15.10 Coffee Break
15.10-15.35 E. M. Rigo, Vandomme, Syntactic complexity of ultimately periodic sets of integers
15.35-16.00 C. van de Woestijne, Fibered products of number systems

Accommodation

Here is a map where most hotels are represented.
You can also have a look at informations provided by the tourism office.

Hotel Cygne d'Argent
Price for single/double room 68/82 euros, breakfast included (wifi and internet free)

To get this price, when booking a room please specify : "Numeration 2011-Universite de Liège".
When booking a room, also provide all the necessary credit card informations and DONT use independent booking website (otherwise, it is not possible to have this special rate).
Rue Beeckman 49
B-4000 LIEGE
Tel: + 32 (0) 4/223.70.01
Fax: + 32 (0) 4/222.49.66
E-mail: info@cygnedargent.be
Website: www.cygnedargent.be

Best Western Univers Hotel
Price for single/double room 68/79 euros, breakfast included

To get this price, when booking a room please specify : "Numeration 2011-Universite de Liège".
When booking a room, also provide all the necessary credit card informations and DONT use independent booking website (otherwise, it is not possible to have this special rate).
Rue des Guillemins 116
B-4000 Liège
Tel : + 32 (0) 4/254 55 55
Fax : + 32 (0) 4/254 55 00
Email: univershotel@skynet.be
www.univershotel.be

Husa de la Couronne
Price for single/double room 75/85 euros, breakfast included

To get this price, when booking a room please specify : "Numeration 2011-Universite de Liège".
When booking a room, also provide all the necessary credit card informations and DONT use independent booking website (otherwise, it is not possible to have this special rate).
Place des Guillemins 11
B-4000 Liège
Tel : + 32 (0) 4/340 30 00
Fax : + 32 (0) 4/340 30 01
Email: info.couronne@husa.es
www.hotelhusadelacouronne.be

Hotel Ibis Liège Centre Opera
Price for single/double room 82/96 euros, breakfast included.
To get this price, when booking a room please specify : "Numeration 2011-Universite de Liège".
When booking a room, also provide all the necessary credit card informations and DONT use independent booking website (otherwise, it is not possible to have this special rate).
Place de la République Française, 41
B-4000 Liège
Tel: + 32 (0) 4/230 33 33
Fax: + 32 (0) 4/223 04 81
Email: h0864@accor.com

Hotel les acteurs
Price for single/double room 59/73 euros, breakfast included.
To get this price, when booking a room please specify : "Numeration 2011-Universite de Liège".
When booking a room, also provide all the necessary credit card informations and DONT use independent booking website (otherwise, it is not possible to have this special rate).
rue sur la Fontaine, 41
B-4000 Liège
Tel: + 32 (0) 4/223 00 80
Fax: + 32 (0) 4/221 19 48
Email: lesacteurs@skynet.be
www.lesacteurs.be

Hotel Mercure
Price for single/double room 91/107 euros, breakfast included.
Please use the form or the French version.
Bd de la Sauvenière, 100
B-4000 Liège
Tel: + 32 (0) 4/221 77 11
Fax: + 32 (0) 4/221 77 01
Email: h1893@accor.com (à l'attention de Valérie)

Ramada Plaza Liège City Center
Price for a room 92 euros, breakfast included.
To get this price, when booking a room please specify : "Numeration 2011-Universite de Liège".
When booking a room, also provide all the necessary credit card informations and DONT use independent booking website (otherwise, it is not possible to have this special rate).
Quai Saint Leonard 36
B-4000 Liège
Tel: + 32 (0) 4/228 81 80
Fax: + 32 (0) 4/227 45 75
Email: reservations@ramadaplaza-liege.com

Holiday Inn
Price for single/double room 99/105 euros, breakfast included.

Esplanade de l'Europe 2
B-4020 Liège
Tel: + 32 (0) 4/342 60 20
Fax: + 32 (0) 4/343 48 10
Email: hiliege@alliance-hospitality.com

Outside Liège : you almost need a car to reach the conference center
or be ready to walk for 45 minutes,
Hotel Ibis Boncelles
Price for single room 71 euros, breakfast included.
To get this price, when booking a room please specify : "Numeration 2011-Universite de Liège".
When booking a room, also provide all the necessary credit card informations and DONT use independent booking website (otherwise, it is not possible to have this special rate).
Route du Condroz 15B
b-4100 Boncelles
Tel: + 32 (0) 4/338 53 97
Fax: + 32 (0) 4/338 45 11
ibis.boncelles@belgacom.net

Another Hotel outside Liège where a car is needed is
Hotel Val de l'Ourthe
Price for single/double room 82 euros, breakfast included.
To get this price, when booking a room please specify : "Numeration 2011-Universite de Liège".
When booking a room, also provide all the necessary credit card informations and DONT use independent booking website (otherwise, it is not possible to have this special rate).
rue de Tilff, 412
B-4031 Angleur
Tel + 32 (0) 4/365 91 71
Fax + 32 (0) 4/365 62 89
valdourthe@skynet.be

Registration

Please use the link on the left and fill in the registration form. There is no registration fee and we will try to offer you the conference banquet (if we do not obtain enough funds, minimal participation fees for the banquet could be asked).

Useful information

The conference will be held at the Department of Math. on the University Campus "Sart-Tilman".
You can follow essentialy the same informations as the ones found here.

Deadlines

Contributed talks are welcome. You can submit a proposal (dealine April 30, 2011) in form of an extended abstract (4 to 6 pages in a pdf file). Simply send your abstract by e-mail. The scientific committee will check the relevance of the submissions with the topics of the conference and some selection could be made depending on the total number of submissions.

Organizing Committee

Contact

follow this link to send an e-mail.

List of participants (23rd May)