Theorem A . [04Q2]
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Theorem A.
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is a piecewise-linear map, thus pulls back any piecewise-linear function on to a model function on ;
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is an affinoid torus fibration away from a graph ; the vertices of are the barycenters of the 1 and 2-dimensional cells of , and the edges join the barycenter of a 2-dimensional cell with the barycenters of its 1-dimensional faces;
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in a neighbourhood of a vertex , the affine structure induced by is determined by the toric geometry of : there is a natural -linear embedding of inside the fan of , preserving the polytopal decomposition and sending to the origin;
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