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Department of Computer Science and Technology

Date: 
Thursday, 13 June, 2024 - 17:00 to 18:00
Speaker: 
Tobias Nipkow (Technische Universität München)
Venue: 
Live-streamed at MR14 Centre for Mathematical Sciences

Alpha-beta pruning is an efficient search strategy for two-player game trees. It was invented in the late 1950s and is at the heart of most implementations of combinatorial game playing programs. In this talk I will survey my recent formalizations and verifications of a number of standard variations of alpha-beta pruning. Findings include:

- Basic variants already having a property ascribed to an improved version

- Authors being confused about which algebraic structure they actually work in

- Generalizations to new algebraic structures

- The implementation in a famous paper is flawed

Seminar series: 
Formalisation of mathematics with interactive theorem provers

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