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20062026
most citedConnes' embedding conjecture and sums of hermitian squares

116 citations · 1.1k across the 72 of their papers we have counts for

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math.FA2025

Fejér--Riesz factorization for positive noncommutative trigonometric polynomials

Igor Klep, Jacob Levenson, Scott McCullough

We prove a Fejér-Riesz type factorization for positive matrix-valued noncommutative trigonometric polynomials on , where is either the…

math.FA2025

Positive operator-valued noncommutative polynomials are squares

Abhay Jindal, Igor Klep, Scott McCullough

We establish operator-valued versions of the earlier foundational factorization results for noncommutative polynomials due to Helton (Ann.~Math., 2002) and one of the authors (Line…