Walter Tholen Walter Tholen's web site


Mini Curriculum
International Dual Degree
Workshop Haute Bodeux 07



Welcome to my website!

The site is intended to give you some basic information about my work.           If you need to know more, please contact me.

Postal Address:

Department of Mathematics and Statistics
York University
Toronto, Ontario, Canada M3J 1P3
E-mail: mylastnameATmathstatDOTyorkuDOTca
Office: N605 Ross Building
Fax: (416) 736 5757
Telephone:  (416) 736 5250 or (416) 736 2100 ext. 33918



Recent Research

Teaching (2017-18, 18-19)

Semi-reflective extensions of dualities and a new approach to the Fedorchuk duality arXiv
Fraction, restriction and range categories from non-monic classes of morphisms   arXiv    (Previous title: Abandoning monomorphisms: partial maps, fractions, factorizations arXiv)
Order-enriched solid functors arXiv
Metagories pdf
Lax pullback complements and pullbacks of spans pdf
Met-like categories amongst concrete topological categories pdf
Quantalic topological theories pdf
A note on the topologicity of quantale-valued topological spaces ... pdf
Monads on Q-Cat and their lax extensions to Q-Dist ... pdf
Approximate injectivity ... pdf
Lax distributive laws for topology, II ... pdf
Quantale-valued topological spaces via closure and convergence ...pdf 
Lax distributive laws for topology, I ... pdf
The fundamental group as the structure of a dually affine space... pdf
Noli turbare circulos meos -- A mathematical tribute to Reinhard Börger... pdf
Categorically proper homomorphisms of topological groups... pdf
Topological categories, quantaloids and Isbell adjunctions...pdf
Limits and colimits of quantaloid-enriched categories and their distributors... pdf
Lax algebra meets topology... pdf
Proper maps and the Kuratowski-Mrowka Theorem... pdf
Nullstellen and subdirect representation...pdf
Dual closure operators and their applications...pdf
From lax monad extensions to topological theories...pdf
MATH 3021 3.0: See Moodle
MATH 3022 3.0: See Moodle
MATH 4400 6.0: See Moodle
MATH 6180 3.0 (Reading)


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This site was last updated 10/18/19