Kojiro Higuchi. w{\cal P}_w Is Not a Heyting Algebra. In Fernando Ferreira, Benedikt Löwe, Elvira Mayordomo, Luís Mendes Gomes, editors, Programs, Proofs, Processes, 6th Conference on Computability in Europe, CiE 2010, Ponta Delgada, Azores, Portugal, June 30 - July 4, 2010. Proceedings. Volume 6158 of Lecture Notes in Computer Science, pages 190-194, Springer, 2010. [doi]
Abstract is missing.