It is an essential ingredient in various constructions of symplectic manifolds, including symplectic (Marsden–Weinstein) quotients, discussed below, and symplectic cuts and sums.
它在各种辛流形的建立中是一个重要的部分，包括将会在后面讨论的symplectic (Marsden–Weinstein) quotients，以及symplectic cuts和sums。