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Order! Order!

open access: yesThe Bulletin of the Royal College of Surgeons of England
Embracing the College values.
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The order of a group of even order [PDF]

open access: yesProceedings of the American Mathematical Society, 2007
We will give an estimation of the order of a group of even order by the order of the centralizer of an involution using the classification of finite simple groups.
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On ordered graphs and graph orderings

open access: yesDiscrete Applied Mathematics, 1994
The main result of this paper is: For every oriented graph \(\vec G\) with in-degree for every vertex at least 2 there is no graph \(H\) such that every strong orientation \(\vec H\) of \(H\) contains a copy of \(\vec G\). This disproves a conjecture of \textit{M. Cochand} and \textit{P. Duchet} [Algorithms Comb. 8, 39-46 (1989; Zbl 0698.05055)].
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