26 citations · 107 across the 13 of their papers we have counts for
4 papers · 1 filter
Lexicase Selection at Scale
Li Ding, Ryan Boldi, Thomas Helmuth +1
Lexicase selection is a semantic-aware parent selection method, which assesses individual test cases in a randomly-shuffled data stream. It has demonstrated success in multiple res…
Functional Code Building Genetic Programming
Edward Pantridge, Thomas Helmuth, Lee Spector
General program synthesis has become an important application area for genetic programming (GP), and for artificial intelligence more generally. Code Building Genetic Programming (…
The Environmental Discontinuity Hypothesis for Down-Sampled Lexicase Selection
Ryan Boldi, Thomas Helmuth, Lee Spector
Down-sampling training data has long been shown to improve the generalization performance of a wide range of machine learning systems. Recently, down-sampling has proved effective…
Population Diversity Leads to Short Running Times of Lexicase Selection
Thomas Helmuth, Johannes Lengler, William La Cava
In this paper we investigate why the running time of lexicase parent selection is empirically much lower than its worst-case bound of O(N*C). We define a measure of population dive…