01/2015-06/2015, M2R GPX, supervised by Roland Martin and me. We developed a finite-difference code, “OptimallyAccurate2D”, with discontinuities that do not coincide with the grid. This study was published a year later and the code is still available on my GitHub. Oleg got the best mark at his Master’s defence. He then started a PhD at KAUST and is now a data scientist at ExxonMobil.