Derek Smith

collaborators

2 papers

math.GT2018

A note on Dehn colorings and invariant factors

Derek A. Smith, Lorenzo Traldi, William Watkins

If $A$ is an abelian group and $ϕ$ is an integer, let $A (ϕ)$ be the subgroup of $A$ consisting of elements $a \in A$ such that $ϕ \cdot a = 0$ . We prove that if $D$ is a diagram of a…

math.CO2017

Planarity, duality and Laplacian congruence

Derek A. Smith, Lorenzo Traldi, William Watkins

We discuss the connections tying Laplacian matrices to abstract duality and planarity of graphs.