116 citations · 1.1k across the 72 of their papers we have counts for
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math.FA2010★ 74 cited
Proper Analytic Free Maps
J. William Helton, Igor Klep, Scott McCullough
This paper concerns analytic free maps. These maps are free analogs of classical analytic functions in several complex variables, and are defined in terms of non-commuting variable…
math.FA2010
The truncated tracial moment problem
Sabine Burgdorf, Igor Klep
We present tracial analogs of the classical results of Curto and Fialkow on moment matrices. A sequence of real numbers indexed by words in non-commuting variables with values inva…