Noun
B and B (plural B and Bs)
Initialism of bed and breakfast.
Approval Voting, Boston: Birkhäuser, pp. 16–17 A voter that has strict preferences between three candidates—prefers A to B and B to C—does not have dichotomous preferences. Source: Internet
Cantor attempts to prove that if A and B are sets with A equivalent to a subset of B and B equivalent to a subset of A, then A and B are equivalent. Source: Internet
If it is assumed again that a pair of rules A and B, with A ordered before B and B creating an environment to which A could have applied, B is said to counterfeed A, and the relationship is counterfeeding. Source: Internet
Note that the expressions A ⊂ B and B ⊃ A are used differently by different authors; some authors use them to mean the same as A ⊆ B (respectively B ⊇ A), whereas others use them to mean the same as A ⊊ B (respectively B ⊋ A). Source: Internet