J L Balcázar Welcome. My office has moved to the A0 building: room 225. Mi despacho esta ahora en el edificio A0: despacho 225. My phone number has changed as well. Mi numero de telefono tambien ha cambiado: (+34)-93-413-7847 (UPC ext 37847). La direccion de correo electronico acabada en .es quedara obsoleta en breve plazo. The e-address ending with .es is deprecated. Usa .edu en su lugar. Use .edu instead. Contact policy: I leave on a very aggressive spam killer which is likely to erase your message, mistaken for spam; it will give some opportunities to messages from educational institutions and from some european countries, though. Also the subject is checked for presence of the word "math". Good luck. This page has alternated repeatedly between construction and destruction phases. It is unclear what phase is it in right now. Current teaching: Disseny de Bases de Dades (Design of Databases) and Models Abstractes de Càlcul (Abstract Computation Models) at Escola Politecnica Superior dEnginyeria de Vilanova i la Geltre Usual teaching lately (with occasional extras): Fitxers i Bases de Dades (Files and Databases, not this semester). Calculabilitat (Computability theory) at Facultat de Matematiques Our research group: LARCA at UPC Research writings (but most links probably won't work anymore, and the paper you want probably is not there). Ph D advisor or co-advisor of: Jacobo Toran (1988), Ricard Gavalda; (1992), Elvira Mayordomo (1994), Research-related software developed: The Slim system. More later on this year. (I did not say what year was 'this'.) Personal items with many more (broken?) links. To the department's Home Page Aaronson, Scott Ablayev, Farid Allender, Eric Alon, Noga Ambainis, Andris Amir, Ronen Andrei, Neculai Arora, Sanjeev Arsham, Hossein Arvind, V. Auer, Peter Awasthi, Amit Balcazar, Jose L. Barak, Boaz Beame,Paul Beaver, Donald Beigel,Richard Beimel, Amos Bellare, Mihir Ben-Amram, Amir Ben-Or, Michael. Ben-Sasson, Eli Blaeser, Markus Bollig, Beate Bonet, Maria Luisa Buss, Samuel Cahit, Ibrahim Calude, Cristian Case, John Chaitin, Greg Chakrabarti, Amit Chang, Richard Chazelle, Bernard Chen, Hubie Chen, Jianer Codenotti, Bruno Crescenzi, Pierluigi Czumaj,Artur Dantsin,Evgeny