[CG] Re: Sign Relational Manifolds

Cf: Sign Relational Manifolds • 2 http://inquiryintoinquiry.com/2022/11/01/sign-relational-manifolds-2-2/ All, A taste of how manifolds are used in practice may be gleaned from the set of excerpts linked below, from Doolin and Martin (1990), “Introduction to Differential Geometry for Engineers”, which I used in discussing differentiable manifolds with other participants in the IEEE Standard Upper Ontology Working Group ( https://web.archive.org/web/20140512225349/http://suo.ieee.org/ ) . Differential Geometry for Engineers https://web.archive.org/web/20110612002240/http://suo.ieee.org/ontology/thr… 1. https://web.archive.org/web/20070302105328/http://suo.ieee.org/ontology/msg… ••• 9. https://web.archive.org/web/20070705085032/http://suo.ieee.org/ontology/msg… What brought the concept of a manifold to my mind in that context was a set of problems associated with “perspectivity”, “relativity”, and “interoperability” among multiple ontologies. To my way of thinking, those are the very sorts of problems manifolds were invented to handle. Reference ========= Doolin, Brian F., and Martin, Clyde F. (1990), “Introduction to Differential Geometry for Engineers”, Marcel Dekker, New York, NY. Regards, Jon