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Junyi Xie

Publications and source records attributed to Junyi Xie.

58 records · Page 4Linked to original sources

Intersection of valuation rings in $k[x,y]$

We associate to any given finite set of valuations on the polynomial ring in two variables over an algebraically closed field a numerical invariant whose positivity characterizes the case when the intersection of their valuation rings has maximal transcendence degree over the base fields. As an application, we give a criterion for when an analytic branch at infinity in the affine plane that is defined over a number field in a suitable sense is the branch of an algebraic curve.

math.AG↗

Periodic points of birational maps on projective surfaces

We classify birational maps of projective smooth surfaces whose non-critical periodic points are Zariski dense. In particular, we show that if the first dynamical degree is greater than one, then the periodic points are Zariski dense.

math.AG↗