3 citations · 13 across the 17 of their papers we have counts for
Showing 2010Show all
2 papers · 1 filter
math.RA2010
Some remarks on structural matrix rings and matrices with ideal entries
Stephan Foldes, Gerasimos Meletiou
Associating to each pre-order on the indices 1,...,n the corresponding structural matrix ring, or incidence algebra, embeds the lattice of n-element pre-orders into the lattice of…
math-ph2010
Hyperboloid preservation implies the Lorentz and Poincaré groups without dilations
Stephan Foldes
An analogue of the Alexandrov-Zeeman theorem, based on hyperboloid preservation, as opposed to light cone preservation, is provided. This characterizes exactly the Poincaré group,…