EDP Sciences - Road to Open: Despite Challenges, Mathematics Journals Remain Open Access through Subscribe to Open in 2025

"EDP Sciences and the Société de Mathématiques Appliquées et Industrielles (SMAI) are pleased to confirm that all six mathematics journals will remain open access in 2025 under the Subscribe to Open (S2O) model. This outcome, achieved in the face of considerable difficulty, reflects a continued, though increasingly fragile, commitment to equitable and sustainable open access from our subscribers.

This year’s renewal campaign was markedly more challenging than in previous years, prompting reflection on the long-term resilience of the S2O model. While we ultimately succeeded in renewing the journals, the process highlighted a potential loss of momentum for S2O across our subscriber base. In particular, ESAIM: Control, Optimisation and Calculus of Variations (COCV) could only be sustained thanks to the intervention of SMAI and Insmi (CNRS Mathematics), which stepped in to financially support the journal...."