Journal of the Indonesian Mathematical Society
VOLUME 27 NUMBER 3 (November 2021)

On Birkhoff Angles in Normed Spaces

Gunawan, Hendra (Unknown)
Jamaludin, Muhamad (Unknown)
Pratamadirdja, Mas Daffa (Unknown)

Article Info

Publish Date
02 Dec 2021

Abstract

Associated to Birkhoff orthogonality, we study Birkhoff angles in a normed space and present some of their basic properties. We also discuss how to decide whether an angle is more acute or more obtuse than another. In addition, given two vectors $x$ and $y$ in a normed space, we study the formula for Birkhoff `cosine' of the angle from $x$ to $y$ from which we can, in principal, compute the angle. Some examples will be presented.

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Journal Info
Journal of the Indonesian Mathematical Society
Website

Abbrev

JIMS

Publisher

Indonesian Mathematical Society

Subject

Mathematics

Description

Journal of the Indonesian Mathematical Society disseminates new research results in all areas of mathematics and their applications. Besides research articles, the journal also receives survey papers that stimulate research in mathematics and their ...