Skillet (band) nominated and won a Dove Award for Rock Song of the Year for their song "Sick of It". "Vital Signs", a compilation album released exclusively in Europe, was released October 13, 2014. On February 16, 2015 Skillet announced they were writing material for a new album with recording to begin in June with a potential release in the late half of 2015 or early 2016. On April 8, Skillet released a preview of a new song, later revealed to be called "Out of Hell", on their social media pages. On May 20, 2016 the album's title, "Unleashed", was announced and
Envy-free item assignment the agents' utilities are not additive, the MNW solution is not necessarily EF1; but if the agents' utilities are at least submodular, the MNW solution satisfies a weaker property called "Marginal-Envy-Freeness except-1-item" (MEF1). There is an alternative criterion called Envy-freeness-except-cheapest (EFx): For each two agents A and B, if we remove from the bundle of B "any" item, then A does not envy B. EFx is strictly stronger than EF1. As of this writing, it is not known whether EFx allocations always exist. Given an allocation "X", define the envy ratio of "i" in "j" as: so the ratio is