# unlesss

## Contents

## EnglishEdit

### EtymologyEdit

Attributed to John Horton Conway. From *unless*, by analogy with the formation of *iff* from *if*.

### ConjunctionEdit

**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*G*^{R}or some*H*^{L}≥*G*.

- Partial Order:
**1999**, V. K. Balachandran,*Topological Algebras*, 2000 North-Holland edition, →ISBN, pages 78–79 [1]:- A subset is called
*absorbing*if to each there is a real number such that for all with . Trivially the set is absorbing; on the other hand can never be absorbing (**unlesss**).

- A subset is called
**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*≥*G*^{R}or*H*^{L}≥*G*for some*G*^{R}∈**G**^{R}or some*H*^{L}∈**H**^{L}. ¶ (Analogous to “iff”, the term “**unlesss**” means “unless and only unless”.)