Elias Koutsoupias

Computer scientist, co-author of the 2026 proof

Appears in 1 story

Stories

Paper claims proof of the 38-year-old k-server conjecture

As of September 2026: Co-author of the claimed proof

A paper posted to arXiv on September 14 claims to settle the k-server conjecture, a problem in theoretical computer science open since 1988. Authors Christian Coester, Elias Koutsoupias, and Marek Zbysiński say they have proven that the Work Function Algorithm achieves the optimal competitive ratio of k on every metric space.

Updated Sep 15