Journals / İTÜ Dergisi Seri D: Mühendislik / 2005 / Cilt: 4 - Sayı: 2

Equivalence transformations of the general first order balance equations

Birinci mertebe genel denklik denklemlerinin eşdeğerlik dönüşümleri

Pages
93–104
Publication Date
2022-10-19
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The general results are applied to Maxwell equations.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:If a given set of equations contains some arbitrary functions or parameters we have in fact a family of sets of equations of the same structure.
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Key Findings & Data:Isovector fields are defined as such vector fields whose orbits generate transformations under which the ideal remains invariant.
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Conclusion & Impact:The general results are applied to Maxwell equations.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

If a given set of equations contains some arbitrary functions or parameters we have in fact a family of sets of equations of the same structure. Almost all field equations of classical continuum physics possess this property since they describe certain common or similar behaviors of diverse materials. Equivalence groups are defined as groups of continuous transformations which leave a given family of equations invariant. In other words, they map an arbitrary member of the family onto another member of the same family and they transform a solution of a set of equations onto a solution of another set in the same family whereas the symmetry transformations map a solution of a system to another solution of the same system. In this work equivalence transformations of first order general balance equations involving arbitrary number of dependent and independent variables are investigated by using isovector method. To study system of balance equations occupies a privileged position since many equations in classical physics are of this form. The method consists of determining isovector fields of a closed ideal of certain exterior forms defined on a properly extended manifold. Isovector fields are defined as such vector fields whose orbits generate transformations under which the ideal remains invariant. After obtaining determining equations of equivalence transformations, their explicit solutions are found. The general results are applied to Maxwell equations.

Özet

Verilmiş bir diferansiyel denklemler grubu keyfi fonksiyonlar, parametreler içeriyorsa, elimizde aynı yapıda denklemler grubunun ailesi var demektir. Eşdeğerlik grupları, verilen denklem ailesini değişmez bırakan dönüşümlerin grubu olarak tanımlanır. Simetri dönüşümleri diferansiyel denklemlerin bir çözümünü başka çözümlere götürürken, eşdeğerlik dönüşümleri ailenin bir üyesini diğer üyesine götürür ve denklemler grubunun bir çözümünü aynı ailenin başka grubunun çözümüne dönüştürür. Çalışmada birinci mertebe genel denklik denklemleri sisteminin eşdeğerlik dönüşümleri izovektör yöntemi ile incelenmiştir. Klasik sürekli fiziğin bir çok denklemi bu grupta ifade edilebildiğinden, sonuçları geniş uygulama alanına sahiptir. Eşdeğerlik dönüşümlerinin belirleyici denklemleri elde edildikten sonra açık çözümleri belirlenmiş, genel şema elektromagnetizmanın Maxwell denklemlerine uygulanmıştır.

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Cite This Article

ÖZER, S. S., ŞUHUBİ, E. (2022). Equivalence transformations of the general first order balance equations. İTÜ Dergisi Seri D: Mühendislik, Cilt: 4 - Sayı: 2, 93–104. https://ajindex.com/articles/557278

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References (3)

  1. Anco S.C. ve Bluman G., (1997). Nonlocal symmetries and nonlocal conservation laws of Maxwell's equations, Journal of Mathematical Phyiscs, 38, 7, 3508-3532. Anco S.C. ve Pohjanpelto J., (2001). Classification of local conservation laws of Maxwell's equations, Acta Applicandae. Mathematicae., 69, 3, 285-327. Bateman H., (1909). The transformations of electrodynamical equations, Proceedings of the London Mathematical Society, 8, 223-264. Bluman G.W. ve Kumei S., (1989). Symmetries and differential equations, Springer Verlag, New York. Cartan E., (1945). Les Systèmes Diffèrentiels Extèrieurs et Leurs Applications Gèometriques, Hermann, Paris. Cunningham E., (1909). The principle of relativity in electrodynamics and extensions there of, Proceedings of the London Mathematical Society, 8, 77-98. Edelen D.G.B., (1980). Isovector methods for equations of balance, Sijthoff Noordhoff, Alphen aan den Rijn. Edelen D.G.B., (1981). Programs for calculation of isovector fields in Reduce 2 environment, Center for application of mathematics, Lehigh University. Edelen D.G.B., (1985).
  2. Applied exterior calculus, Wiley, New York. Fushchich W.I. ve Nikitin A.G., (1987).
  3. Symmetries of Maxwell's equations, D. Reidel Publishing Company, Dortrecht, Holland Fushchich W.I. ve Tsirfa I.M., (1985). On symmetry of nonlinear equations of electrodynamics, Teoreticheskaya i Matematicheskaya. Fizika, 64, 1, 41-50. Harrison B.K. ve Estabrook F.B., (1971). Geometric approach to invariance groups and solutions of partial differential equations, Journal of Mathematical Phyics, 12, 4, 653-666. İbragimov N.H., (1994). CRC Handbook of Lie group analysis of differential equations, Vol. 1, Symmetries, Exact Solutions and conservation Laws, CRC Press, Boca Raton. İbragimov N.H., (1996). CRC Handbook of Lie group analysis of differential equations, Vol. 3: New trend in theoretical developments and computational methods, CRC Press, Boca Raton. Ovsiannikov L.V., (1982). Group analysis of differential equations, Translation Edition by Ames W.F., Academic Press, New York. Şuhubi E.S., (1991). Isovector fields and similarity solutions for general balance equations, International Journal of Engineering Science, 29, 1, 133-150. Şuhubi E.S., (1999). Equivalence groups for second order balance equations, International Journal of Engineering Science, 37, 15, 1901-1925. Şuhubi E.S., (2000). Explicit determination of isovector fields of equivalence groups for second order balance equations, International Journal