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math.AP2025

The Time-Periodic Cahn-Hilliard-Gurtin System on the Half Space as a Mixed-Order System with General Boundary Conditions

Guillaume Neuttiens, Jonas Sauer

A well-posedness and maximal regularity result for the time-periodic Cahn-Hilliard-Gurtin system in the half space is proved. For this purpose, we introduce a novel class of comple…

math.AP2025

Limited-Range Multilinear Off-Diagonal Extrapolation and Weighted Transference Principle

Jonas Sauer

Multilinear extrapolation results are established in a limited-range, multilinear, and off-diagonal setting for mixed-norm Lebesgue spaces over -finite measure spaces. Int…

cs.DS2025

The Expiration Streaming Model: Diameter, -Center, Counting, Sampling, and Friends

Lotte Blank, Sergio Cabello, MohammadTaghi Hajiaghayi +5

An important thread in the study of data-stream algorithms focuses on settings where stream items are active only for a limited time. We introduce a new expiration model, where eac…

cs.CG2025

Bicriteria Polygon Aggregation with Arbitrary Shapes

Lotte Blank, David Eppstein, Jan-Henrik Haunert +6

We study the problem of aggregating a set of polygons by covering them with disjoint representative regions, thereby inducing a clustering of the polygons. Equivalently, this can b…

cs.LG2025

Weisfeiler and Leman Follow the Arrow of Time: Expressive Power of Message Passing in Temporal Event Graphs

Franziska Heeg, Jonas Sauer, Petra Mutzel +1

An important characteristic of temporal graphs is how the directed arrow of time influences their causal topology, i.e., which nodes can possibly influence each other causally via…