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Evolution of Stress Response and Adhesin Gene Family in Pathogenic Yeasts
Friday, February 14, 2025 3:30pm to 4:20pm
Speaker: Bin He, Biology Dept.

Operator Theory Seminar - Palle Jorgensen; University of Iowa Department of Mathematics
Tuesday, February 18, 2025 1:30pm to 2:30pm
Title: Free Probability.
Abstract: We study a family of free stochastic processes whose covariance kernels K may be derived as a transform
of tempered measures σ. These processes arise, for example, in consideration of non-commutative analysis
involving free probability. Hence our use of semi-circle distributions, as opposed to Gaussians. In this
setting we find an orthonormal basis in the corresponding non-commutative L2 of sample-space. We define
a stochastic integral for our family of...

Mathematics Special Lecture - Professor Eva Gallardo Gutierrez
Thursday, February 20, 2025 12:30pm to 1:20pm
Title: THE INVARIANT SUBSPACE PROBLEM: GENERAL OPERATOR THEORY VS. CONCRETE OPERATOR THEORY?
Abstract: The Invariant Subspace Problem for (separable) Hilbert spaces is a long-standing open question that traces back to John Von Neumann’s works in the fifties asking, in particular, if every bounded linear operator acting on an infinite dimensional separable Hilbert space has a non-trivial closed invariant subspace. Whereas there are well-known classes of bounded linear operators on Hilbert spaces...

Mathematics Colloquium - Eva Gallardo-Gutierrez; Complutense University of Madrid
Thursday, February 20, 2025 3:30pm to 4:30pm
Title: COMPACT PERTURBATIONS OF NORMAL OPERATORS: WHERE ARE THEIR INVARIANT SUBSPACES?
Abstract: In this talk, we will address the problem regarding the existence of non-trivial closed invariant subspaces of compact perturbations of normal operators acting boundedly on separable, infinite-dimensional complex Hilbert spaces. After considering the finite-rank case, we will show that a large class of such operators are decomposable, extending, in particular, recent results of Foias, Jung, Ko and...

Operator Theory Seminar - Professor Eva Gallardo-Gutierrez
Tuesday, February 25, 2025 1:30pm to 2:30pm
Title: The Ces`aro operator: shift semigroups and invariant subspaces
Abstract: Despite the fact that one of the most classical transformations of sequences is the Ces`aro operator C, there are still many questions about it unsettled. In the seventies, Kriete and Trutt proved the striking result that the Ces`aro operator is subnormal, namely, C has a normal extension. Nonetheless, it remains unknown the description of the closed invariant subspaces of C. In this talk, we will discuss the...
Algebra Seminar - Shashank Singh; University of Iowa Department of Mathematics
Wednesday, February 26, 2025 3:30pm to 4:20pm

Algebra Seminar - Matthew Barber; University of Iowa Department of Mathematics
Wednesday, March 5, 2025 3:30pm to 5:20pm
Algebra Seminar - Bakhtiar Ahmed; University of Iowa Department of Mathematics
Wednesday, March 12, 2025 3:30pm to 5:20pm
Algebra Seminar - Margarita Bustos Gonzalez; University of Iowa Department of Mathematics
Wednesday, March 26, 2025 3:30pm to 5:20pm

Algebra Seminar - Blake Mattson; University of Iowa Department of Mathematics
Wednesday, April 2, 2025 3:30pm to 4:20pm
Mathematics Colloquium
Thursday, April 10, 2025 3:30pm to 4:30pm
The 46th Annual Great Plains Operator Theory Symposium (GPOTS 2026)
Tuesday, May 26 to Saturday, May 30, 2026 (all day)
The Great Plains Operator Theory Symposium. From a modest beginning in 1981, the Great Plains Operator Theory Symposium (GPOTS) has become a major annual conference. It rotates between Universities in the U.S., with a new host university every year, and with NSF funding. For Spring 2026, it will be at the University of Iowa, a founding university. By now, GPOTS has evolved into a major international conference on operator theory and operator algebras. The symposium focuses on recent developments in Operator Algebras and Operator Theory. At the conference, leading researchers will discuss important new developments, new directions, and will propose problems for future research.