unlesss

== English == === Etymology === Attributed to John Horton Conway. From unless, by analogy with the formation of iff from if. === Conjunction === unlesss (mathematics, logic) Precisely unless. 1990, James Glimm, The Legacy of John Von Neumann, American Mathematical Society, →ISBN, page 279, Partial Order: G ≥ H unlesss (unless and only unless) H ≥ some GR or some HL ≥ G. 2004, William Fraser, Susan Hirshberg, and David Wolfe, "The Structure of the Distributive Lattice of Games Born by Day n", in Integers: Electronic Journal of Combinatorial Number Theory 5(2) (2005), page 2, G ≥ H unlesss H ≥ GR or HL ≥ G for some GR ∈ GR or some HL ∈ HL. ¶ (Analogous to “iff”, the term “unlesss” means “unless and only unless”.) === References === MathWorld === Anagrams === sunless