Max Gläser

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2ranked-venue papers
2as first author
2since 2021 · last 2024
0000-0001-6150-9431ORCID · corroborated

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Theory of computation · 2 · 2 first-author · 2 since 2021
YearPublicationVenuePosition
2024 Sub-Exponential Lower Bounds for Branch-and-Bound with General Disjunctions via Interpolation
abstract
This paper investigates linear programming based branch-and-bound using general disjunctions, also known as stabbing planes, for solving integer programs. We derive the first sub-exponential lower bound (in the encoding length L of the integer program) for the size of a general branch-and-bound tree for a particular class of (compact) integer programs, namely 2Ω(L1/12-ɛ) for every ɛ > 0. This is achieved by showing that general branch-and-bound admits quasi-feasible monotone real interpolation, which allows us to utilize sub-exponential lower-bounds for monotone real circuits separating the so-called clique-coloring pair. The same ideas also prove that refuting Θ(log(n))-CNFs requires size 2nΩ(1) branch-and-bound trees with high probability by considering the closely related notion of infeasibility certificates introduced by Hrubeš and Pudlák [18]. One important ingredient of the proof of our interpolation result is that for every general branch-and-bound tree proving integer-freeness of a product P × Q of two polytopes P and Q, there exists a closely related branch-and-bound tree for showing integer-freeness of P or one showing integer-freeness of Q. Moreover, we prove that monotone real circuits can perform binary search efficiently.
Max Gläser, Marc E. Pfetsch
SODA1
2022 On the Complexity of Finding Shortest Variable Disjunction Branch-and-Bound Proofs
Max Gläser, Marc E. Pfetsch
IPCO1