Departement of
Mathematics and Statistics

Universität Konstanz
Real Geometry and Algebra > Prof. Dr. S. Kuhlmann > Employee > Sarah-Tanja Hess

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Research

Keywords concerning my research interests: Hilbert's 17th problem, Hilbert's 1888 theorem, positive semidefinite polynomials (PSD), sums of squares (SOS), Veronese embedding, Veronese variety, Gram matrices, varieties of minimal degree, quadratics forms, quadrics, polynomial optimization, semidefinite programming

Preprints

Intermediate Cones between the Cones of Positive Semidefinite Forms and Sums of Squares (with Charu Goel and Salma Kuhlmann ), arXiv: 2303.13178
A Refinement of Hilbert's 1888 Theorem: Separating Cones along the Veronese Variety (with Charu Goel and Salma Kuhlmann ), arXiv: 2401.03813

Doctoral Project

Intermediate Cones between the SOS and PSD Cones (since October 2020)
Supervisor: Prof. Dr. Salma Kuhlmann, Universiy of Konstanz
Co-Supervisor: Asst. Prof. Dr. Charu Goel , Indian Institute of Information Technology (IIITN), Nagpur, India

Theses

Master's Thesis

Title Examination of the Connection between Horn's Problem and the Lax Conjecture
Language Englisch
Published in KOPS
URI (for citations) http://nbn-resolving.de/urn:nbn:de:bsz:352-2-160cfrqubrq6n2
Supervisors Prof. Dr. S. Kuhlmann and Dr. habil. M. Infusino

Bachelor's Thesis

Title Elliptic Curves in Key-Exchange Cryptography
Language Englisch
Published in KOPS
URI (for citations) http://nbn-resolving.de/urn:nbn:de:bsz:352-2-gulfjde9kdan6
Supervisor Prof. Dr. S. Kuhlmann