This volume presents the cutting edge of research in Genetic Programming, as showcased at the 20th European Conference (EuroGP 2017). The proceedings compile 14 revised full papers and 8 poster papers that were selected from 32 submissions, reflecting the diverse and active state of the field. The research spans a broad spectrum of topics, including program synthesis, genetic improvement, grammatical representations, self-adaptation, multi-objective optimization, program semantics, search landscapes, mathematical programming, and applications in games, operations research, networks, and evolvable hardware. This collection offers a comprehensive overview of current advancements and challenges in genetic programming.

This collection of papers from EuroGP 2017 offers a snapshot of the current research landscape in genetic programming. The breadth of topics covered, from theoretical aspects like search landscapes and program semantics to practical applications in areas such as games and evolvable hardware, suggests a field with both deep theoretical underpinnings and wide-ranging applicability. The inclusion of both full papers and poster presentations indicates a vibrant community actively exploring new methodologies and problem domains within genetic programming.