The EMS and EMS Press are sad to hear of the recent death of Professor Rolf Jeltsch, esteemed mathematician and former President of the EMS (1999-2002), the Swiss Mathematical Society (2002-2003), the GAMM Society for Applied Mathematics and Mechanics (2005-2007) and the ICIAM (2007-2011). The EMS and EMS Press extend their condolences to the family and friends of Professor Jeltsch.
After successfully introducing the model in 2020, EMS Press has continued to grow its Subscribe to Open offering in each year since. In this article we explore the methodology used to achieve fair and sustainable open access, with the implementation of sustainability thresholds.