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- Bernardo Llano, Mika Olsen
- Discussiones Mathematicae Graph Theory
- 2007

In this paper, we construct infinite families of tight regular tournaments. In particular, we prove that two classes of regular tournaments, tame molds and ample tournaments are tight. We exhibit an infinite family of 3-dichromatic tight tournaments. With this family we positively answer to one case of a conjecture posed by V. Neumann-Lara. Finally, we show… (More)

- Gabriela Araujo-Pardo, Mika Olsen
- Discrete Mathematics
- 2010

In this paper we exhibit infinite families of vertex critical r-dichromatic circulant tournaments for all r ≥ 3. The existence of these infinite families was conjectured by NeumannLara (7), who later proved it for all r ≥ 3 and r 6= 7. Using different methods we find explicit constructions of these infinite families for all r ≥ 3, including the case when r… (More)

- Victor Neumann-Lara, Mika Olsen
- Australasian J. Combinatorics
- 2009

The concept of molds, introduced by the authors in a recent preprint, break regular tournaments naturally into big classes: cyclic tournaments, tame tournaments and wild tournaments. We enumerate completely the tame molds, and prove that the dichromatic number of a tame tournament is 3.

- Ana Paulina Figueroa, Bernardo Llano, Mika Olsen, Eduardo Rivera-Campo
- Discrete Applied Mathematics
- 2012

- Ana Paulina Figueroa, César Hernández-Cruz, Mika Olsen
- Discrete Mathematics
- 2017

- Victor Neumann-Lara, Mika Olsen
- Ars Comb.
- 2013

- Ana Paulina Figueroa, Juan José Montellano-Ballesteros, Mika Olsen
- Discrete Mathematics
- 2016

- Gabriela Araujo-Pardo, Mika Olsen
- Electronic Notes in Discrete Mathematics
- 2007

In this talk we expose the results about infinite families of vertex critical r-dichromatic circulant tournaments for all r ≥ 3. The existence of these infinite families was conjectured by Neumann-Lara [6], who later proved it for all r ≥ 3 and r = 7. Using different methods we find explicit constructions of these infinite families for all r ≥ 3, including… (More)

- M Olsen
- Sykepleien
- 1968

- M I Olsen
- Sykepleien
- 1988