Website of Ruaan Kellerman

Papers

Valentin Goranko, Ruaan Kellerman, and Alberto Zanardo, Structural Theory of Trees. II. Completeness and Completions of Trees, Contributions to Discrete Mathematics, vol. 18 no. 2, pp. 210 - 233, 2023
Valentin Goranko, Ruaan Kellerman, and Alberto Zanardo, Structural Theory of Trees. I. Branching and Condensations of Trees, Contributions to Discrete Mathematics, vol. 18 no. 2, pp. 188 - 209, 2023
Ruaan Kellerman, First-order theories of bounded trees, Archive for Mathematical Logic, vol. 61 issue 1 - 2, pp. 263 - 297, 2022
Valentin Goranko and Ruaan Kellerman, Approximating trees as coloured linear orders and complete axiomatisations of some classes of trees, Journal of Symbolic Logic, vol. 86 no. 3, pp. 1035 - 1065, 2021
Ruaan Kellerman, First-order aspects of tree paths, Logic Journal of the IGPL, vol. 24 no. 4, pp. 688 - 704, 2015
Valentin Goranko and Ruaan Kellerman, Classes and theories of trees associated with a class of linear orders, Logic Journal of the IGPL, vol. 19 no. 1, pp. 217 - 232, 2011
Ruaan Kellerman, First-Order Theories of Orthogonality Structures, Logic Journal of the IGPL, vol. 15 no. 3, pp. 255 - 270, 2007

Book chapters

Philippe Balbiani, Valentin Goranko, Ruaan Kellerman and Dimiter Vakarelov, Logical Theories for Fragments of Elementary Geometry, Handbook of Spatial Logics, pp. 343 - 428, Springer, 2007

Activities

64th Annual Congress of the South African Mathematical Society, Bloemfontein, South Africa, 29 November - 1 December 2021 (held online)
Logic Colloquium 2021 (2021 European Summer Meeting of the Association for Symbolic Logic), Poznań, Poland, 19 - 24 July 2021 (held online)
UJ Logic Workshop, Johannesburg, South Africa, 27 - 28 January 2020
Research visit to Valentin Goranko at Stockholm University, Sweden, 3 - 27 April 2018
UJ Logic Workshop, Johannesburg, South Africa, 29 - 30 January 2018
58th Annual Congress of the South African Mathematical Society, Johannesburg, South Africa, 4 - 6 November 2015
Model Theory Conference, Stellenbosch, South Africa, 9 - 13 March 2015
Research visit to Valentin Goranko at the Danish Technical University, Denmark, 8 - 31 August 2013
8th Scandinavian Logic Symposium, Roskilde, Denmark, 20 - 21 August 2012
53rd Annual Congress of the South African Mathematical Society, Pretoria, South Africa, 3 - 5 November 2010
Zuse-Collatz Colloquium, Pretoria, South Africa, 9 October 2010
52nd Annual Congress of the South African Mathematical Society, Johannesburg, South Africa, 2 - 4 November 2009
7th Panhellenic Logic Symposium, Patras, Greece, 15 - 19 July 2009
Logic Colloquium 2006 (2006 European Summer Meeting of the Association for Symbolic Logic), Nijmegen, The Netherlands, 27 July - 2 August 2006
1st World School on Universal Logic, Montreux, Switzerland, 26 - 30 March 2005

Refereeing

I have reviewed manuscripts for the following journals:

Quaestiones Mathematicae
Journal of Logic, Language and Information

DAL Seminar Series

I coordinate the seminar series in Discrete Mathematics, Algebra, and Logic (DAL) at the University of Pretoria. Please contact me if you are interested in giving a talk as part of this series.