plural of Murasugi sum

The union of a finite sequence of surfaces taken over a disk common to every adjacent pair of the sequence, such that the boundary of the disk comprises some even number of closed arcs, disjoint except at their endpoints, which are alternatingly subarcs of the two surfaces' boundaries.

(mathematics) The vector whose initial and final points are those of a series of other vectors laid end to end.

plural of sum of its parts

A Chinese vegetable, a variety of Brassica rapa parachinensis subspecies, similar to bok choy but slimmer, with smooth green leaves and pale green stems, and clusters of flowers on the tips of the inner shoots

plural of empty sum

plural of nullary sum

A summary.

plural of vector sum

(game theory) Pertaining to a game or situation where overall benefits to all participants can increase.