Abstract Motivated by international energy trade between countries with profit-maximizing domestic producers, we analyze Nash games played among leaders of Stackelberg games (NASP). We prove it is both \(\Sigma^p_2\)-hard to decide if the game has a pure-strategy (PNE) or…

Remember me, I'm the one that's back from over Time's gone by and I'm still so far from over Well, cannot say anything more!

In conferences held at the Oberwolfach Institute, participants usually dine together in a room witg tables of different sizes, and each participant has an assigned seat. Gerhard Ringel asked whether there exists a seating arrangement for an odd number \(v\) of people and…

At Polytechnique, we -- Ph.D students -- are required to take a few courses before technically levelling up to Ph.D. candidates. As Optimizer, I feel compelled to be a bit lazy, and I always seek for something quick and clear. Plus, since I am also first-in-class in terms o…