doi:10.1007/s00224-023-10123-1engMayordomo, ElviraOgihara, MitsunoriRudra, AtriForeword: a Commemorative Issue for Alan L. SelmanART-2023-134255Alan L. Selman (1941 - 2021) was a former Editor-in-Chief of the journal Theory of Computing Systems. To commemorate his extraordinary contributions to theoretical computer science, we solicited papers from the theory community. Nine groups responded to the call, which we present in this issue...2023http://zaguan.unizar.es/record/12678610.1007/s00224-023-10123-1http://zaguan.unizar.es/record/126786oai:zaguan.unizar.es:126786THEORY OF COMPUTING SYSTEMS 67, 3 (2023), 415-416All rights reservedhttp://www.europeana.eu/rights/rr-f/info:eu-repo/semantics/openAccess