Canonical ring
（重定向自Plurigenus）
In mathematics, the pluricanonical ring of an algebraic variety V (which is non-singular), or of a complex manifold, is the graded ring
of sections of powers of the canonical bundle K. Its nth graded component (for ![n\geq 0](/Images/godic/202502/03/e2dbd4b26d758137070f5b0edfc107d62029.png")
) is:
that is, the space of sections of the n-th tensor product K of the canonical bundle K.