2 code implementations • 5 Apr 2024 • Benjamin Doerr, Martin S. Krejca, Nguyen Vu
Besides providing a superior algorithm for the TSS problem, this work shows that randomized parameter choices and elementary greedy heuristics can give better results than complex algorithms and costly parameter tuning.
no code implementations • 5 Apr 2024 • Martin S. Krejca, Carsten Witt
We propose a new, flexible approach for dynamically maintaining successful mutation rates in evolutionary algorithms using $k$-bit flip mutations.
1 code implementation • 6 Oct 2023 • Benjamin Doerr, Martin S. Krejca
We show that the bivariate EDA mutual-information-maximizing input clustering, without any problem-specific modification, quickly generates a model that behaves very similarly to a theoretically ideal model for EBOM, which samples each of the exponentially many optima with the same maximal probability.
no code implementations • 28 Feb 2023 • Firas Ben Jedidia, Benjamin Doerr, Martin S. Krejca
Roughly speaking, when the variables take $r$ different values, the time for genetic drift to become significant is $r$ times shorter than in the binary case.
no code implementations • 24 Feb 2023 • Benjamin Doerr, Aymen Echarghaoui, Mohammed Jamal, Martin S. Krejca
From this better understanding of the population diversity, we obtain stronger runtime guarantees, among them the statement that for all $c\ln(n)\le\mu \le n/\log n$, with $c$ a suitable constant, the runtime of the $(\mu+1)$ GA on $\mathrm{Jump}_k$, with $k \ge 3$, is $O(n^{k-1})$.
no code implementations • 27 Apr 2022 • Carola Doerr, Martin S. Krejca
We prove upper bounds for the expected run time of random local search on this MAJORITY problem for its entire parameter spectrum.
1 code implementation • 7 Feb 2022 • André Biedenkapp, Nguyen Dang, Martin S. Krejca, Frank Hutter, Carola Doerr
We extend this benchmark by analyzing optimal control policies that can select the parameters only from a given portfolio of possible values.
no code implementations • 16 Jul 2020 • Benjamin Doerr, Martin S. Krejca
In their recent work, Lehre and Nguyen (FOGA 2019) show that the univariate marginal distribution algorithm (UMDA) needs time exponential in the parent populations size to optimize the DeceptiveLeadingBlocks (DLB) problem.
no code implementations • 14 Jun 2018 • Martin S. Krejca, Carsten Witt
Estimation-of-distribution algorithms (EDAs) are general metaheuristics used in optimization that represent a more recent alternative to classical approaches like evolutionary algorithms.
no code implementations • 22 May 2018 • Timo Kötzing, Martin S. Krejca
As corollaries, the same is true for our upper bounds in the case of variable and multiplicative drift.
no code implementations • 10 Aug 2016 • Duc-Cuong Dang, Tobias Friedrich, Timo Kötzing, Martin S. Krejca, Per Kristian Lehre, Pietro S. Oliveto, Dirk Sudholt, Andrew M. Sutton
This proves a sizeable advantage of all variants of the ($\mu$+1) GA compared to (1+1) EA, which requires time $\Theta(n^k)$.