activity
20012018
most citedOn subgroup depth

23 citations · 98 across the 38 of their papers we have counts for

collaborators

42 papers

math.RA2018

Uniquely separable extensions

Lars Kadison

The separability tensor element of a separable extension of noncommutative rings is an idempotent when viewed in the correct endomorphism ring; so one speaks of a separability idem…

math.RA2017★ 8 cited

Separable equivalence of rings and symmetric algebras

Lars Kadison

We continue a study of separable equivalence from Hokkaido Mathematical Journal 24 (1995), 527-549. We prove that symmetric separable equivalent rings and are linked by a F…

math.QA2017

An in-Depth Look at Quotient Modules

Lars Kadison

The coset -space of a finite group and a subgroup is a fundamental module of study of Schur and others around 1930; for example, its endomorphism algebra is a Hecke algebra of d…

math.QA2015

Algebra depth in tensor categories

Lars Kadison

Study of the quotient module of a finite-dimensional Hopf subalgebra pair in order to compute its depth yields a relative Maschke Theorem, in which semisimple extension is characte…

math.RT2014

Subgroup depth and twisted coefficients

Alberto Hernandez, Lars Kadison, Marcin Szamotulski

Danz computes the depth of certain twisted group algebra extensions in Comm. Alg. (2011), which are less than the values of the depths of the corresponding untwisted group algebra…

math.RA2013

A tower condition characterizing normality

Lars Kadison

We define left relative H-separable tower of rings and continue a study of these begun by Sugano. It is proven that a progenerator extension has right depth two if and only if the…