All parts of a product could construct an affine space, and then each of them had a corresponding vector in the concomitant vector space of the affine space.
Complete classification of affine spheres with constant cross section curvature in 4-dimensional affine space is given.
The relations of a fuzzy affine space and a fuzzy subspace are investigated by using a translation of fuzzy set.
dimension of affine space
n-dimensional affine space