September 2013 - Categories - categories.org.au

Partial functor
by David Leduc 16 Mar '15

16 Mar '15

Hi, A partial functor from C to D is given by a subcategory S of C and a functor from S to D. What is the appropriate notion of natural transformation between partial functors that would allow to turn small categories, partial functors and those "natural transformations" into a bicategory? The difficulty is that two partial functors from C to D might not have the same definition domain. [For admin and other information see: http://www.mta.ca/~cat-dist/ ]

7 6

Research positions
by Maria Manuel Clementino 26 Feb '14

26 Feb '14

5-YEAR RESEARCH POSITIONS The Centre for Mathematics of the University of Coimbra (CMUC) invites applications for five 5-year research positions in all areas of Mathematics. Applicants should have a PhD in Mathematics and at least three years of post-doctoral experience, with an international-level publication record and demonstrated ability to perform independent research. Preference will be given to candidates working in one of the areas in which the members of CMUC are currently active. A very good command of English is required. The appointments will be made for three years, renewable for two more. Successful applicants are expected to develop research within the areas of interest of CMUC. They should also contribute to graduate studies, supervising students from the Department of Mathematics. The basic salary is equivalent to the index 195 of the Portuguese research career (in the order of 42 500 euros a year), in accordance with the Ciência 2008 guidelines http://alfa.fct.mctes.pt/apoios/contratacaodoutorados/edital2008 Benefits include private health insurance and social security. Applicants should send • cover sheet (available from www.mat.uc.pt/cmuc/coversheet.pdf) including names and contact information of three persons who can provide a letter of recommendation • curriculum vitae (publication list included) • a 5-year research proposal (2 pages max), emphasizing their own research goals as pdf files to cmuc(a)mat.uc.pt. The subject of the e-mail message must include the job reference C2008 FCTUC CMUC v15-v19. The deadline for applications is *September 10, 2008.* ------------------------------ More information can be found at www.mat.uc.pt

1 1

fractions_regular
by Eduardo J. Dubuc 28 Sep '13

28 Sep '13

I would like if sombody can tell me what it is known (or what he/she knows) about categories of fractions of regular categories. I imagine that if you have a calculus of right AND left fractions, then the category of fractions is regular, but what about if the calculus is only of right fractions ?. Any comments will be welcome. Greetings e.d. [For admin and other information see: http://www.mta.ca/~cat-dist/ ]

2 1

Postdoc position in Warsaw
by Bartek Klin 27 Sep '13

27 Sep '13

A three-year postdoctoral position is available under the direction of Bartek Klin in the Institute of Informatics, University of Warsaw. The position is in the field of semantics of programming languages and process algebras, within the project "Modular operational semantics: a bialgebraic approach", funded by the Polish National Science Center. The applicants should have (or be close to completion of) a PhD degree in Mathematics or Computer Science, and be interested in topics such as semantics of programming languages, process algebra, formal methods, and/or category theory. The position is available from November 2013, but the starting date may be postponed on request of a suitable candidate. In addition, interested candidates are invited to apply for a postdoctoral fellowship at the Warsaw Center of Mathematics and Computer Science (http://www.wcmcs.edu.pl/node/41) with the rather short deadline of *** October 15th, 2013 ***. These are one-year positions (with a possible extension to two years), with an excellent salary which may be used as an additional source of funding for the first years of stay in Warsaw. For further information please contact Bartek Klin (klin(a)mimuw.edu.pl) [For admin and other information see: http://www.mta.ca/~cat-dist/ ]

1 0

Professor position at PPS - University Paris Diderot
by Pierre-Louis Curien 26 Sep '13

26 Sep '13

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Professor position at PPS in 2014 A permanent Full Professor position in Computer Science will be opened next year at Paris Diderot University (Paris 7). The hired candidate will work in the laboratory PPS (Preuves, Programmes et Systemes) on topics related to the following theme: Foundations of Programming Languages and Proof Assistants The position will be opened around February 2014, with decision taken around May 2014, and job starting in September 2014. More details on this position are available here: (1) http://www.pps.univ-paris-diderot.fr/poste-PR-2014 Notice: there is a - rather light - preliminary phase called qualification, through which all candidates have to go. Deadline for the first step of qualification: 2013-10-24. More details on qualification are given on the web page (1). Please don't hesitate to contact Thomas Ehrhard (thomas.ehrhard(a)pps.univ-paris-diderot.fr) or Delia Kesner (delia.kesner(a)pps.univ-paris-diderot.fr) for more information (especially about qualification). [For admin and other information see: http://www.mta.ca/~cat-dist/ ]

1 0

Exponentials in linearly distributive categories
by Harley D. Eades III 26 Sep '13

26 Sep '13

Hi, everyone. Sorry about all the emails yesterday. I am now rested and can properly formulate an email. I am interested in linearly distributive categories with exponentials. That is the right adjoint of tensor. I was trying to find references on these, but was not successful. Google was not on my side. However, I decided to visit Seely's webpage and found the following: J. Cockett and R. Seely. Proof theory for full intuitionistic linear logc, bilinear logic, and mix categories. Theory and Applications of Categories, 3(5):85–131, 1997. The above paper covers what I need. If anyone has any other references they recommend I would love to read them. Thanks, .\ Harley [For admin and other information see: http://www.mta.ca/~cat-dist/ ]

2 1

Question about proof nets
by Harley D. Eades III 26 Sep '13

26 Sep '13

Hi, everyone. I am currently trying to understand (tensor, cotensor)-circuits from R. F. Blute, J. Cockett, R. Seely, and T. H. Trimble. Natural deduction and coherence for weakly distributive categories. Journal of Pure and Applied Algebra, 113(3):229–296, 1996. I am wondering if anyone can tell me what the significance of the half circle under the tensor in the circuit for tensor elimination? Unfortunately, I cannot draw the circuit here. It is however on page 9 of the above paper. At first I thought it was indicating symmetry, but this doesn't make sense. Any help would be greatly appreciated. .\ Harley [For admin and other information see: http://www.mta.ca/~cat-dist/ ]

2 1

Postdoctoral positions in Warsaw
by Marek Zawadowski 24 Sep '13

24 Sep '13

Dear Category Theorists, Applications are now open for postdoctoral positions at the Warsaw Center of Mathematics and Computer Science (WCMCS). Deadline for applications: October 15th, 2013. For more information, see http: //wcmcs.edu.pl/node/41 (the full announcement is also enclosed below). Best regards, Marek Zawadowski [For admin and other information see: http://www.mta.ca/~cat-dist/ ]

1 0

[fm-announcements] Formal Methods Position at NASA
by MUNOZ, CESAR (LARC-D320) 19 Sep '13

19 Sep '13

The Formal Methods team at NASA Langley Research Center, Hampton, Virginia, U.S., has opened the following positions (U.S. citizenship is required to apply). ANNOUNCEMENT NO: LA13D0064 POSITION: Research Computer Scientist, AST, Computer Research and Development, GS-1550-12/13, Promotion Potential GS-13 LOCATION: Org D320, Safety-Critical Avionics Systems Branch OPENING DATE: September 18, 2013 CLOSING DATE: October 09, 2013 AREA OF CONSIDERATION: This announcement is open to all qualified U.S. citizens. This position is located in the Safety-Critical Avionics Systems Branch within the Research Directorate. This position involves conducting research to develop formal verification methods for the analysis, design, and implementation of advanced future aircraft and spacecraft safety-critical systems. Additional details are available at the following websites prior to the closing date: http://www.usajobs.gov/GetJob/ViewDetails/351820600 *** ANNOUNCEMENT NO: LA13P0045 POSITION: NASA's Pathways Program Recent Graduate, Research Computer Scientist, GS-1550-12 Promotion Potential GS-13 LOCATION: D320, Safety-Critical Avionics Systems Branch OPENING DATE: September 18, 2013 CLOSING DATE: October 09, 2013 AREA OF CONSIDERATION: Current students from education institutions interested in paid opportunities with Federal agencies or recent Graduates from qualifying institutions within two years of degree or certification (Veterans precluded by their military service obligation, will have up to six years to apply) or Presidential Management Fellowships for individuals who have received a qualifying advanced degree within the preceding two years. This position is located in the Safety-Critical Avionics Systems Branch within the Research Directorate. This position involves conducting research to develop formal verification methods for the analysis, design, and implementation of advanced future aircraft and spacecraft safety-critical systems. Additional details are available at the following websites prior to theclosing date: http://www.usajobs.gov/GetJob/ViewDetails/351743700 *** For more information on NASA's application process, go to http://nasajobs.nasa.gov <http://nasajobs.nasa.gov/> <http://nasajobs.nasa.gov/> [For admin and other information see: http://www.mta.ca/~cat-dist/ ]

1 0

INFO + PROGRAM : "From categories to logic, linguistics and physics: A tribute for the 90th birthday of Joachim Lambek"
by Louis Pelletier 16 Sep '13

16 Sep '13

From categories to logic, linguistics and physics: A tribute for the 90th birthday of Joachim Lambek September 21, 2013 Centre de recherches mathematiques Montreal, Canada *********************************************************************** Dear Participants, We would like to remind you that the meeting "From categories to logic, linguistics and physics: A tribute for the 90th birthday of Joachim Lambek" will be held at the Centre de recherches mathematiques (CRM) of Montreal, Saturday, September 21, 2013. The program is now posted on the meeting website: http://www.crm.umontreal.ca/2013/Lambek13/Horaire_Lambek13.pdf The CRM is located on the 5th floor of the Pavillon Andre-Aisenstadt on the campus of the Universite de Montreal. See building #20 on the campus map: http://www.crm.umontreal.ca/2013/Lambek13/gettingtoCRM_e.php The lectures will be held in room 6214 (6th floor, Andre-Aisenstadt building). Registration will take place on Saturday morning, from 8:30 to 9:30, in room 5345 (5th floor, Andre-Aisenstadt building). Every participant will have an access to the Wi-Fi network on the campus. The lecture room is equipped with blackboards, a data projector (to view .pdf files) and two overhead projectors. Getting to CRM from the airport: All passenger flights arrive at Montreal-Trudeau International Airport. You can take a taxi from the airport to your hotel or to CRM (about $30). There is also a shuttle bus ("747 Express Bus") from the Montreal-Trudeau Airport that brings you to the central bus station in Montreal which is located downtown Montreal and allows you to transfer directly to the Berri-UQAM Metro station (one-way ticket: $9/adult; the ticket is also good for use on the metro and local bus system for 24 hours after its purchase.). The first stop of the 747 bus is the Lionel Groulx metro station, which is also a convenient metro transfer point. Getting to CRM from the central bus station in Montreal: From the central bus station in Montreal, take a taxi (appr. $15.00 - $20.00) or the metro ($3.00) to Berri-UQAM metro station (access from Montreal central bus station) going towards Montmorency ("orange" line) to Jean-Talon station. From there, take the "blue" line, going towards Snowdon and exit at Universite-de-Montreal metro station. You are now on the Universite de Montreal campus, a few minutes away from CRM. Look for the metro exit that takes you to a long mechanical ramp (like an escalator, but with no stairs), take it to the top and exit the building (it will have taken you up a big hill and to the front of building #14 on the campus map; the CRM is on the 5th floor of building #20.). Getting to CRM from the train station: At the train station, take the Bonaventure Metro going towards Cote-vertu, on the "orange" line. Change stations at Snowdon and take the "blue" line towards Saint-Michel. Exit at Universite-de-Montreal station. http://www.stm.info/en/info/networks/metro Getting to CRM by car: If you are travelling by car, take the "Decarie" Expressway (Highway 15) and exit at "Chemin Queen Mary Road". Travel east on "Chemin Queen Mary Road". When you cross Decelles Street (one street east of "Chemin Cote-des-Neiges") you enter the campus of the Universite de Montreal. Be aware that it's difficult to park on the streets surrounding the campus. However for the price of $13 per day, you can use campus parking lots. For further details and local information please consult the Website maintained by the Centre de recherches mathematiques (CRM): http://www.crm.math.ca and the meeting website: http://www.crm.math.ca/Lambek13/ We look forward to seeing you! Louis Pelletier Conference Coordinator CRM

1 0