A notion of Dg-orthogonality and Dg-angle in normed spaces

Abstract

The purpose of this article is to formulate the Dg-orthogonality using a 2-norm in normed spaces. We will prove the relations between the Dg-orthogonality and the g-orthogonality. Moreover, we study the Dg-angle and its properties in normed spaces. We also prove the relations between the g-angle and the Dg-angle.

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