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math.CO2007
Distributive lattices defined for representations of rank two semisimple Lie algebras
L. Wyatt Alverson, Robert G. Donnelly, Scott J. Lewis +4
For a rank two root system and a pair of nonnegative integers, using only elementary combinatorics we construct two posets. The constructions are uniform across the root systems A1…
math.MG2007
One dimensional metrical geometry
N J Wildberger
One dimensional metrical geometry may be developed in either an affine or projective setting over a general field using only algebraic ideas and quadratic forms. Some basic results…