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Система компьютерной алгебры GAP

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Открыта: 05-02-2002

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Александр Борисович Коновалов

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Система компьютерной алгебры GAP: Novi Sad Algebraic Conference 2009



University of Novi Sad
Faculty of Science
Department of Mathematics and Informatics
Novi Sad, Serbia

SECOND ANNOUNCEMENT

'NOVI SAD ALGEBRAIC CONFERENCE' (NSAC 2009)
Novi Sad, August 17-21, 2009

Topic areas:
-universal (general) algebra
-semigroups, groups and (semi)group-related structures
-lattices and other ordered structures
-algebraic methods in computer science
-clones and many-valued logics

The aim of this conference is to review and promote the most recent
research trends in the above areas. Its scientific program will
consist of a number of invited 50-minute plenary lectures and 20-
minute contributed talks. The number of sections will depend on the
number of presented talks.

List of plenary speakers:
Libor Barto (Univerzita Karlova, Praha, CZECH REPUBLIC)
Victor Dalmau (Universitat Pompeu Fabra, Barcelona, SPAIN)
Martin Goldstern (Technische Universita:t, Wien, AUSTRIA)
Marcel G. Jackson (La Trobe University, Bundoora, Melbourne,
AUSTRALIA)
Keith A. Kearnes (University of Colorado, Boulder, CO, U.S.A.)
Marcin Kozik (Unywersitet Jagiellon'ski, Krako'w, POLAND)
Edmond W. H. Lee (Simon Fraser University, Burnaby, CANADA)
Ralph N. McKenzie (Vanderbilt University, Nashville, TN,
U.S.A.)
Jaroslav Nes Norman R. Reilly (Simon Fraser University, Burnaby, CANADA)
Alexander Yu. Ol'shanskii (Vanderbilt University, Nashville,
TN, U.S.A.)
Olga B. Sapir (Vanderbilt University, Nashville, TN, U.S.A.)
Mark V. Sapir (Vanderbilt University, Nashville, TN, U.S.A.)
Matthew Valeriote (McMaster University, Hamilton, ON, CANADA)
Mikhail V. Volkov (Ural State University, Ekaterinburg, RUSSIA)
Friedrich Wehrung (Universite' de Caen, FRANCE)

Registration:
If you intend to participate, please send an e-mail to:
nsac2009@im.ns.ac.yu

The email should contain the following information:
full name
affiliation
address
do you intend to give a talk? - if the answer is "yes", then
we need:
a tentative title, and later

an abstract (in any dialect of TeX) with a definitive title and
what you need for the talk (beamer, overhead projector, chalk
and chalkboard,...)

REGISTRATION DEADLINE: May 31, 2009

ABSTRACT SUBMISSION DEADLINE: June 30, 2009

The booklet containing submitted abstracts will be available at the
conference.

The conference fee:
70 EUR or 90 USD (or the equivalent amount in Serbian
dinars). The payment should be paid at the conference in cash. The
registration fee is waived for the participants affiliated with the
Universities of Novi Sad and Szeged, also for the invited speakers.

TRAVEL

By Air:

Belgrade:

We recommend flying into Belgrade International airport 'Nikola Tesla'
located in Surcin, a suburb of Belgrade. Luxurious hotels in Novi Sad
often offer a transport to and from Belgrade airport, so you may be
able to arrange it with the hotel. If you want one of us to pick you
up by car, we will try to arrange it.

Besides usual airlines, Belgrade airport is also serviced by
Germanwings, which are one of the cheap European companies (like Ryan
Air, Easy Jet,...), so you should check if they have a particularly
good deal.

Alternatively, the airport is served by the bus line 72 from Belgrade
City Transit Company (every half an hour, 100 dinars) and by JAT
Airways bus (every hour, 160 dinars). Both bus lines stop in the
downtown Belgrade, a short distance from the long-distance bus station
and the train station, which are located next to each other (separated
by a parking lot) and where you can pick up transportation to Novi
Sad. Ask a someone where to exit the bus, though the final stations
are not too far from the train/bus stations anyway. Bus line 72
terminates at 'Zeleni Venac' which is 5 minutes' downhill walk from
the long-distance bus station, while JAT Airways bus stops at the
train station, and then goes up Nemanjina street to hotel Slavija
where it terminates. If you take the JAT bus and don't exit at the
train station, just backtrack down Nemanjina Street to find the train
station (10 minutes downhill). Follow the directions for train and bus
transport from that point. There are several taxis from the airport
which can take you either to downtown Belgrade or even directly to
Novi Sad, though we do not recommend them as they are expensive (some
as much as 15-20 Euros to Belgrade and 60-70 Euros to Novi Sad).

Budapest:

Another airport to which you may consider flying is Budapest airport.
Again, check first if your hotel offers an airport transit to and from
Budapest and for which price. If it does not, we recommend reserving
in advance a Gea Tours shuttle which can take you to Novi Sad in about
5 hours for 70 Euros (return ticket) or 40 Euros (one way). Their
website is http://www.geatours.rs/eng/index.htm.

This may make sense for non-European participants, as the price of
long air travel to and from Budapest may be significantly cheaper than
to Belgrade. Gea Tours shuttles will typically deliver you either to
the address of your choice in Novi Sad, or at the taxi parking near
the train station. Make sure before travel which will be the case, and
in case it is the train station, you can inform us so that we can pick
you up from there, or follow the directions for bus/train transport.

By Bus:

Novi Sad long-distance bus station is located next to the train
station. There are busses from main Belgrade bus station to Novi Sad
every half an hour or so. When you arrive you should look for a taxi
to take you to your hotel or to Math Department. As is usual in most
European countries, there are taxis which cost significantly more
operating near the train and bus stations, but they are being chased
away by our local police as they operate without license. The large
parking separated by the train station from the bus station contains
usually the regular taxis which will not over-charge you. To make
doubly sure of this, we recommend using taxis which are in one of the
following companies: 'SOS', 'Grand', 'Vojvodjani', 'MAXI Novosadjani',
'Lav', 'Delta' and 'Pan'.

By Train:

The Serbian railway seems to have deteriorated pretty badly in the
current crisis. According to some report, there is a fair chance of
cancellation for most trains, and from our personal experience, delays
are a certainty. Though it is two to three times cheaper to go from
Belgrade to Novi Sad by train than by bus, we do not recommend it. The
only train one can trust to be always running and late within reason
is the international train operating between Budapest and Belgrade. We
will post a link to train schedule when it becomes available in late
June on the conference website.

By Car:

For Central and Eastern Europeans, arriving by car makes most sense
economically, particularly if several people carpool (travel in the
same vehicle). A VERY important issue is to buy a so-called 'green
card' valid for Serbia with your car insurance company (in any
European country except Russia, with whom we don't have a green card
agreement), as otherwise the cost of mandatory car insurance at the
border could be 100 Euros or more! Green card should cost you ten
times less. You will probably arrive via highway E-75 (either from
Hungary to the North, or Belgrade to the South), which has a toll gate
between Hungarian border and Novi Sad and another one between Novi Sad
and Belgrade. These tolls are payable in Serbian dinars, each should
cost under 5 Euros for passenger cars (look for Category I vehicles
prices at the toll gate). There are two exits of this highway leading
to Novi Sad.

Another possible direction you may be coming from is via highway E-70
from Zagreb, Croatia. In this case you should exit in the direction of
Ruma (due North) and going through Ruma and Irig and crossing the
Fruska Gora mountain end up in Novi Sad. This is about 40-50 km from
the highway E-70, but a difficult drive due to a narrow and sometimes
steep road and a large number of trucks using it.

We will post detailed driving directions from each of the highways and
a map of Novi Sad on the conference website.

VISAS

You should check our information before travel with your tourist agent
and/or your Foreign Ministry. We are not guaranteeing the completeness
of the information below, it is here just as a guideline. In
particular, some other countries might not need a Serbian visa.

According to the website of the Serbian Tourist Information Center,
the citizens of the following countries DO NOT NEED A SERBIAN VISA for
visits up to 90 days:

Andorra, Argentina, Australia, Austria, Belgium, Belorussia, Bolivia,
Bosnia and Hercegovina, Bulgaria, Canada, Chile, Costarica, Croatia,
Cuba, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Great Britain, Greece, Hungary, Iceland, Ireland, Italy,
Israel, Japan, Letonia, Liechtenstein, Lithuania, Luxemburg,
Macedonia, Malta, Monaco, Netherlands, Norway, New Zealand, Poland,
Portugal, Republic of Corea, Romania, Russian Federation, San Marino,
Seychelles, Singapore, Slovakia, Slovenia, Spain, Switzerland, Sweden,
Tunisia, United States of America, Vatican.

Additionally, people having some types of passports issued by the
following countries also DO NOT NEED A SERBIAN VISA for visits up to
90 days:

- usual passports only: Mexico
- official and diplomatic passports, as well as usual passports with a
clause "on business visit in...": Armenia, Azerbaijan, China, Georgia,
Kyrgistan, Mongolia, People's Republic of Corea, Tajikistan, Ukraine,
Turkmenistan.

- official and diplomatic passports only: Ecuador, Guinea, Pakistan,
Peru, Turkey.
- diplomatic passports only: Egypt

Note: If the new agreement with RUSSIAN FEDERATION is ratified before
the conference, then all citizens of Russian Federation will be
allowed to visit Serbia without a visa for up to 30 days, or 90 days
with a diplomatic or official passport (this is a long-term bilateral
agreement replacing the short-term unilateral decision of Serbian
government from 2008 to allow any Russian Federation citizen to visit
up to 90 days).

If you didn't find your country on the list above, or if you have
obtained a different information from an official source, then you
probably NEED A VISA. Serbian visas require an invitation letter which
you can get from us, as well as some other proofs (proof of personal
funds, return ticket, medical insurance and of arranged lodging while
in Serbia).

We recommend that you ascertain if you need a visa as soon as possible
and if you do, to contact us. We will make haste in sending you the
invitation letter so that the visa process does not prevent you from
participating.

Also, by Serbian law, the lodging establishment in which a foreigner
stays is required to report this to the Police Department, so do not
be surprised or alarmed if your hotel desk asks for your passport when
you first arrive. They will give it back to you within half an hour
(how long depends on the hotel staff efficiency; it can even be a few
minutes).

GETTING AROUND

Although Novi Sad has a very well-organized bus transit system, most
people will find that our (very cheap) taxis are the most convenient
way to move about. The minimal price of a taxi ride is 100 dinars with
most companies (just over 1 Euro) and most rides within the city will
cost less than 200 dinars. We recommend the following taxi companies:
'SOS', 'Grand', 'Vojvodjani', 'MAXI Novosadjani', 'Lav', 'Delta' and
'Pan'. The majority of attractions of the city are within walking
distance of each other and of the Math Department, as the points of
interest are mostly located in the downtown area.

Novi Sad has a large number of restaurants which offer mostly
traditional Serbian and Vojvodina cuisine (the second is a mix between
Serbian and Hungarian), but there is a growing number of restaurants
specializing in international cuisine. Also, there are many bakeries
where one can buy pastry products and bars and cafes of all sorts.

CLIMATE

We may expect a very warm and sunny weather in August in Novi Sad
(perhaps 35 C/95 F, and it can certainly get warmer than that), though
rain is not unheard-of. If there is rain, it can be a violent Summer
storm. We recommend you bring clothes for both eventualities.

ACCOMMODATION

Novi Sad has about a dozen hotels and also several other lodging
establishments. Some of our recommendations are (note that the prices
we give may be outdated, check before deciding):

Luxury:

Hotel 'Park' is a five-star hotel (Serbian standard). It is quite
pricey (70 Euros or so for a single room) and not too close to the
Math Department, over half an hour's walking distance, but the
participants who wish for a luxurious stay will find it there. More
information can be found at the hotel website http://www.hotelparkns.com/
.

'Leopold I' is a newly-renovated hotel which is even more expensive
than 'Park' partly due to the location. Located on top of Petrovaradin
Fortress, across the Danube from the city, it commands a panoramic
view of Novi Sad which is quite beautiful. It is not too far from the
Math Department, (15-20 minutes' walking distance) though on the way
to the hotel one must climb to the fortress, which is a fairly steep
climb (a taxi is a good idea in this direction). This comes with a
price-tag starting at 80 Euros for a single room. More information can
be found at http://www.leopoldns.com/.

New and good:

'Voyager' Apartments is a hotel with apartments, or suites, instead of
rooms. This means it has no dining services except for breakfast, but
instead of rooms you get a spacious apartment with all amenities you
may expect (wireless internet and cable TV, for example). It is the
closest to Math Department, an easy 5-minute walk. Total capacity is
about 40 apartments so you may desire to book a room sooner rather
than later. Price is about 50 Euros for a single suite and 65 Euros
for a double suite. Some suites are too close to a busy street and the
noise may be an issue in these. Website: http://www.voyagerns.co.rs/

'Zenit' is a small hotel located in the very downtown of Novi Sad and
has a secluded location which makes it fairly quiet. It is an easy ten
minutes' walk away from the Math Department, but has only 19 rooms/
apartments which are very large. Price is comparable to 'Voyager', or
slightly more expensive. Website: http://www.hotelzenit.co.rs/index-en.html
.

Cheap:

'Vojvodina' is an old socialist-era hotel with a large number of rooms
located in the downtown (quite close to 'Zenit'). The rooms are small
and very basic, a bed, bathroom and closet. Prices are 40 Euros or
less for a single room. The expected overall quality is less than
other hotels mentioned.

Dormitory (really cheap):

We have reserved 40 beds in the University Dormitory (most rooms are
two-bed rooms, some are single, with a separate bathroom in each room)
for the participants of the conference and can reserve more if needed.
The rent is 10 Euros per night, it is 15-20 minutes' walk away from
the Math Department. You have to reserve a room there through us.

Further information concerning accommodation, travel, social events,
schedule of talks, proceedings and other will also be available at the
conference Web page

http://sites.im.ns.ac.yu/events/2009/nsac2009

which is updated continuously.

E-mail: nsac2009@im.ns.ac.yu

Web: http://sites.im.ns.ac.yu/events/2009/nsac2009

Regular mail: NSAC 2009
Department of Mathematics and Informatics
Trg Dositeja Obradovica 4
21000 Novi Sad
Serbia
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