Two-Dimensional Homogeneous Cubic Systems: Classifications and Normal Forms – V
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The present article is the fifth in a cycle of papers dedicated to two-dimensional homogeneous cubic systems. It considers a case when the homogeneous polynomial vector in the right-hand part of the system has a linear common factor. A set of such systems is divided into classes of linear equivalence, wherein the simplest system being a third-order normal form is distinguished based on properly introduced principles. Such a form is defined by the matrix of its right-hand part coefficients, which is called the canonical form (CF). Each CF has its own arrangement of non-zero elements, their specific normalization, and canonical set of permissible values for the unnormalized elements, which relates the CF to the selected class of equivalence. In addition to classification, each CF is provided with: (a) conditions on the coefficients of the initial system, (b) non-singular linear substitutions that reduce the right-hand part of the system under these conditions to the selected CF, (c) obtained values of CF’s unnormalized elements.
Keywordshomogeneous cubic system normal form canonical form
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