The Algorithmica research community was saddened to learn of the unexpected passing of one of its authors. Dr. David Cariolaro, co-author of the following article, “Polynomial Time Complexity of Edge Colouring Graphs with Bounded Colour Classes” (10.1007/s00453-013-9746-7), died on January 10, 2014. Dr. Cariolaro was a prominent mathematician with Xi’an Jaotong—Liverpool University, Suzhou, China. Dr. Cariolaro’s main research interest was Graph Theory, in particular Graph Colouring. Further information is available at the website dedicated to his memory: http://www.ninotrainito.org/david/david.htm.

The Editorial team of Algorithmica extends condolences to the family of Dr. David Cariolaro.