Special Issue in honor of Professors Peter J. Freyd and F. William Lawvere on the occasion of their 80th birthdays
Front Matter
Marta Bunge
No abstract available
Articles
Ross Street
George Janelidze, Ross Street
Michael Barr
Anders Kock
Christopher Townsend
Giulia Frosoni, Giuseppe Rosolini
Maria Emilia Maietti, Fabio Pasquali, Giuseppe Rosolini
Andrej Bauer
Matías Menni
Peter Johnstone
Walter Tholen
Thomas Cottrell, Soichiro Fujii, John Power
Clemens Berger, Ralph M. Kaufmann
Jiří Adámek, Jiří Rosický
Marcelo Fiore