36 research outputs found
Very ample polarized self maps extend to projective space
Let be a projective variety defined over an infinite field, equipped with
a line bundle , giving an embedding of into \mb{P}^m and let be a morphism such that . Then
there exists an integer extending to \mb{P}^m
A dynamical pairing between two rational maps
Given two rational maps and on \PP^1 of degree at least
two, we study a symmetric, nonnegative-real-valued pairing
which is closely related to the canonical height functions $h_\varphi$ and
$h_\psi$ associated to these maps. Our main results show a strong connection
between the value of and the canonical heights of points which
are small with respect to at least one of the two maps and .
Several necessary and sufficient conditions are given for the vanishing of
. We give an explicit upper bound on the difference between the
canonical height $h_\psi$ and the standard height $h_\st$ in terms of
, where denotes the squaring map. The pairing
is computed or approximated for several families of rational
maps