Immanuel Albrecht, Winfried Hochstättler
Published 2018-07-02Version 1
We show that every lattice path matroid of rank at least two has a quite simple coline, also known as a positive coline. Therefore every orientation of a lattice path matroid is 3-colorable with respect to the chromatic number of oriented matroids introduced by J. Ne\v{s}et\v{r}il, R. Nickel, and W. Hochst\"attler.
Topological lower bounds for the chromatic number: A hierarchy
Two Erdos problems on lacunary sequences: Chromatic number and Diophantine approximation
On the Chromatic Number of $\mathbb{R}^n$ for Small Values of $n$
![QR code for arXiv:1807.00585 [math.CO]](http://oss.arxitics.com/images/favicon.svg)