Awhile back I had written some code to solve Volterra integral equations (integral equations where one of the integration bounds is a variable). The code is available on Github (https://github.com/oliverpierson/volterra). Just curious if there'd be any interest in adding this to Numpy? I still have some work to do on the code. However, before I invest too much time, I was trying to get a feel for the interest in this functionality.