Christian Grussler

activity

20182026

collaborators

8 papers

math.OC2026

Model-Free Disturbance Observer with Online Modification: Listening to MFDOOM

Nadav Barak, Christian Grussler

Data-Enabled Predictive Control (DeePC) has recently emerged as a framework for controlling unknown systems from data. However, its performance relies on the relevance of the colle…

math.RA2026

Inversion of the Multiplicative Matrix Compound Operator

Debojyoti Dey, Ron Ofir, Christian Grussler

We study the problem of determining a matrix whose $k$ th multiplicative compound, with $k > 1$ , is a prescribed matrix $M$ . The cardinality of the set of matrices whose $k$ th multi…

math.CO2026

Efficient $k$ -Sign Consistency Verification of Hankel Matrices via Schur Polynomials

Christian Grussler, Tobias Damm

We consider the problem of certifying (strict) $k$ -sign consistency of a matrix, that is, whether all of its $k$ -th order minors share the same (strict) sign. Although this problem…

math.OC2025

Discrete-Time Periodic Monotonicity Preserving Systems

Christian Grussler

Two nested classes of discrete-time linear time-invariant systems, which differ by the set of periodic signals that they leave invariant, are studied. The first class preserves the…

math.OC2024

On System Operators with Variation Bounding Properties

Christian Grussler, Chaim Roth, Kang Tong

The property of linear discrete-time time-invariant system operators mapping inputs with at most $k - 1$ sign changes to outputs with at most $k - 1$ sign changes is investigated. We s…

math.OC2021

Internally Hankel $k$ -positive systems

Christian Grussler, Thiago B. Burghi, Somayeh Sojoudi

The classes of externally Hankel $k$ -positive LTI systems and autonomous $k$ -positive systems have recently been defined, and their properties and applications began to be explored…