Positivity of GIT heights of zero-cycles and hyperplane arrangements

preprint2015arXivOpen access

Abstract

In 1996 as part of the development of arithmetic intersection theory and Arakelov theory, Zhang defined a "GIT height function" for semi-stable algebraic cycles in projective space. In the same work, Zhang conjectured that this height function was positive. We prove this conjecture for zero-cycles and hyperplane arrangements.

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