30 citations · 93 across the 17 of their papers we have counts for
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math.AG2022
Positivstellensätze for Semirings
Konrad Schmüdgen, Matthias Schötz
In this paper we develop a number of results and notions concerning Positivstellensätze for semirings (preprimes) of commutative unital real algebras. First we reduce the Archimede…
math.AG2014
Flat extensions in *-algebras
Bernard Mourrain, Konrad Schmüdgen
The main result of the paper is a flat extension theorem for positive linear functionals on *-algebras. The theorem is applied to truncated moment problems on cylinder sets, on mat…
math.AG2010
Positivstellensätze for Algebras of Matrices
Yurii Savchuk, Konrad Schmüdgen
The paper is concerned with various types of noncommutative Positivstellensätze for the matrix algebra $M_n(\cA)$, where $\cA$ is an algebra of operators acting on a unitary space,…