👉 The term "decanery" is a term used in mathematics and is often associated with complex analysis. In this context, it refers to the study of the behavior of functions that are analytic on an annulus (a region bounded by two concentric circles) and have poles at certain points. The "decanery" can be thought of as the set of all such functions. In more general terms, a decanery is a type of domain in which every analytic function on this domain