I think the usual name is "overlay". At least, that's what Tim Gowers called the one he started :) https://gowers.wordpress.com/2015/09/10/discrete-analysis-an-

I think the usual name is "overlay". At least, that's what Tim Gowers called the one he started :) https://gowers.wordpress.com/2015/09/10/discrete-analysis-an-arxiv-overlay-journal/ https://gowers.wordpress.com/2015/09/10/discrete-analysis-an...