Accepted Paper



Proof of the Orthogonal–Pin Duality

K. Neergård
Fjordtoften 17, 4700 Næstved, Denmark
Abstract. This article contains the proof of a theorem on orthogonal-Pin duality that was cited without proof in a previous article in this journal (Bulg. J. Phys. 48 (2021) 390-399).

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