My official homepage
Publications -- a list of selected publications
Talks -- a list of selected talks
A Fairly New BookLeary, C. and Kristiansen, L.: A Friendly Introduction to Mathematical Logic.
The book is available from a number of internet bookstores.
Read a review from the Mathematical Association of America here.
.... and here is an another review of the book.
The book is listed as an Approved Textbook by AIM.
Logic at the University of OsloFor more on logic at the University of Oslo (courses, seminars etc.), follow this link.
Recent Events in OsloProof, Computation, Complexity 2015
Symposium on the occasion of the retirements of Herman Ruge Jervell and Dag Normann
TeachingINF5840 - spring term 2018 (Computability Theory)
INF2080 - spring term 2019 (Computability and Complexity)
MAT-INF3600 - autumn term 2018 (Mathematical Logic)
Barra's PhD thesis on small subrecursive classes is available here. The thesis also contains some stuff on ordinals and a problem of Skolem's.
MiscellaneousI am the owner of an offprint of "Ein Vollständigkeitsbeweis des zweiwertigen Aussagenkalküls" by Jan Lukasiewics. The cover is signed by the author with a dedication to Thoralf Skolem.
My Erdös number is less or equal to 3. (Check the details.)
My coauthors: Stål Aanderaa, James Avery, Amir Ben-Amram, Mathias Barra, Mark Burgess, Ivan Georgiev, Neil Jones, Christopher Leary, Robert (Bob) Lubarsky, Bedeho M.W. Mender, Jean-Yves Moyen, Juvenal Murwanashyaka, Karl-Heinz Niggl, Hans Kristian Ruud, Jan-Christoph Schlage-Puchta, Frank Stephan, Paul Voda, Andreas Weiermann.