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Authors
Nagaoka, Hiroshi
Amari, Shun-ichi
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Article History
Received: 18 October 2025
Revised: 5 December 2025
Accepted: 10 December 2025
First Online: 24 January 2026
Declarations
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: The authors are current members of the Editorial Board of Information Geometry. The authors state that there is no other conflict of interest.
: The authors declare no competing interests.
