Before revision:  Our networks contain leaky integrate-and-fire neurons (positive dissipation) as well as neurons with inverted sign of the leak current (negative dissipation) .
After revision:  We study inhibitory networks of concave leaky (LIF) and convex "anti-leaky" (XIF) integrate-and-fire neurons (positive dissipation) as well as neurons with inverted sign of the leak current (negative dissipation) .