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A new notion of orthogonality involving area and length

  • Anirban Kundu EMAIL logo , Tarapada Bag and Sk. Nazmul
Published/Copyright: June 8, 2021
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Abstract

In this paper, a space called geometric space, involving both the notions of area and length, is introduced in general setting. The interplay, between these two ideas, is studied. As a result, a new notion of orthogonality, called area-length orthogonality or A-L orthogonality, is demonstrated. It is shown that A-L orthogonality coincides with the standard notion of orthogonality for inner product spaces. Finally, it is proved that A-L orthogonality implies Birkhoff orthogonality, but not conversely.


The research of first author is funded by UGC, New Delhi, India under NET-JRF scheme (Sr. No. 2061441028, Ref. No.: 22/06/2014(i)EU-V). The research of second author is partially supported by the Special Assistance Programme (SAP) of UGC, New Delhi, India [Grant NO. F 510/3/DRS-III/ 2015 (SAP-I).


  1. Communicated by Marcus Waurick

Acknowledgement

The authors are grateful to the anonymous reviewers and editors for their valuable suggestions and comments to revise the manuscript in the present form.

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Received: 2020-01-13
Accepted: 2020-10-15
Published Online: 2021-06-08
Published in Print: 2021-06-25

© 2021 Mathematical Institute Slovak Academy of Sciences

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