{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,2,21]],"date-time":"2025-02-21T06:42:51Z","timestamp":1740120171502,"version":"3.37.3"},"reference-count":40,"publisher":"World Scientific Pub Co Pte Ltd","issue":"02","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int. J. Bifurcation Chaos"],"published-print":{"date-parts":[[2020,2]]},"abstract":"<jats:p>We introduce in this paper an equivalence notion for submersions [Formula: see text], [Formula: see text] open in [Formula: see text], which makes it possible to identify a smooth planar curve with a unique class of submersions. This idea, which extends to the nonlinear setting the construction of a dual projective space, provides a systematic way to handle global implicit descriptions of smooth planar curves. We then apply this framework to model nonlinear electrical devices as classes of equivalent functions. In this setting, linearization naturally accommodates incremental resistances (and other analogous notions) in homogeneous terms. This approach, combined with a projectively-weighted version of the matrix-tree theorem, makes it possible to formulate and address in great generality several problems in nonlinear circuit theory. In particular, we tackle unique solvability problems in resistive circuits, and discuss a general expression for the characteristic polynomial of dynamic circuits at equilibria. Previously known results, which were derived in the literature under unnecessarily restrictive working assumptions, are simply obtained here by using dehomogenization. Our results are shown to apply also to circuits with memristors. We finally present a detailed, graph-theoretic study of certain stationary bifurcations in nonlinear circuits using the formalism here introduced.<\/jats:p>","DOI":"10.1142\/s0218127420500339","type":"journal-article","created":{"date-parts":[[2020,3,10]],"date-time":"2020-03-10T09:56:49Z","timestamp":1583834209000},"page":"2050033","source":"Crossref","is-referenced-by-count":2,"title":["Associate Submersions and Qualitative Properties of Nonlinear Circuits with Implicit Characteristics"],"prefix":"10.1142","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0868-4446","authenticated-orcid":false,"given":"Ricardo","family":"Riaza","sequence":"first","affiliation":[{"name":"Depto. de Matem\u00e1tica Aplicada a las TIC and Information Processing and Telecommunications Center, ETS Ingenieros de Telecomunicaci\u00f3n, Universidad Polit\u00e9cnica de Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"219","published-online":{"date-parts":[[2020,3,10]]},"reference":[{"key":"S0218127420500339BIB001","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-319-02630-5"},{"key":"S0218127420500339BIB002","doi-asserted-by":"publisher","DOI":"10.1007\/978-1-4612-0619-4"},{"volume-title":"Numerical Solution of Initial-Value Problems in Differential Algebraic Equations","year":"1996","author":"Brenan K. 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