Arithmetic surface

==Over a Dedekind Scheme== In even more generality, arithmetic surfaces can be defined over Dedekind schemes, a typical example of which is the spectrum of the ring of integers of a number field (which is the case above). An arithmetic surface is then a regular fibered surface over a Dedekind scheme of dimension one. This generalisation is useful,...
Found on http://en.wikipedia.org/wiki/Arithmetic_surface
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