This is the first word in the name of a family of sets that can be constructed by recursively gluing together cells of increasing even dimension. It’s not “outer,” but an operation named for this word on a vector space V is equivalent (-5[1])to taking the direct sum of two copies of V, or the direct product of V with a set named for this word. Wirtinger derivatives are used in a subfield of mathematics described by this adjective. Multivalued functions on a set described by this adjective may exhibit branch cuts. (10[1])A stereographic (10[2]-5[1])projection (10[2])maps (10[1])the Riemann (10[1])sphere (10[2])to a plane described by “extended” (10[2]-5[1])and this adjective. (10[1])A subfield of mathematics (10[2]-5[1])named for this adjective (-5[1])studies contour integration (10[2])and holomorphic functions. (10[1])For (10[1])10 (10[1])points, (10[2])what (10[1])adjective describes (10[1])numbers of the form (10[1]-5[1])“a plus ib”? (10[3])■END■ (10[7]0[3])