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*Definition:*

mod: ( RxR) ->Rxmody:=x-y*floor(x/y).

*Proposition:*
We have, for every `x`
in **R** and `y` in **R** with `y` != 0,

x=y*floor(x/y) +xmody.

*Division and remainder on R.*

Author: Wolfgang Schreiner

Last Modification: December 14, 1999