Torus Invariant Curves

Abstract

Using the language of T-varieties, we study torus invariant curves on a complete normal variety $X$ with an effective codimension-one torus action. In the same way that the $T$-invariant Weil divisors on $X$ are sums of "vertical" divisors and "horizontal" divisors, so too is each $T$-invariant curve a sum of "vertical" curves and "horizontal" curves. We give combinatorial formulas that calculate the intersection between $T$-invariant divisors and $T$-invariant curves, and generalize the celebrated toric cone theorem to the case of complete complexity-one $T$-varieties.

15 pages, 6 figures. Updated supporting grant information in latest version

References in corpus (1)

• Polyhedral Divisors and Algebraic Torus Actions

Cited by in corpus (1)

• Chow groups and pseudoeffective cones of complexity one $T$-varieties