For example , the fiber product describes how an algebraic variety over one field determines a variety over a bigger field , or the pullback of a family of varieties , or a fiber of a family of varieties .
It has many interpretations and special cases .
The fiber product describes how an algebraic variety over one field determines a variety over a bigger field , or the pullback of a family of varieties , or a fiber of a family of varieties .
It has many interpretations and special cases .