On oscillatory fourth order nonlinear neutral differential equations. I.
N. Parhi, Arun Kumar Tripathy (2004)
Mathematica Slovaca
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N. Parhi, Arun Kumar Tripathy (2004)
Mathematica Slovaca
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N. Parhi, Arun Kumar Tripathy (2005)
Mathematica Slovaca
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N. Parhi, P. Praharaj (1999)
Annales Polonici Mathematici
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Some results concerning oscillation of second order self-adjoint matrix differential equations are obtained. These may be regarded as a generalization of results for the corresponding scalar equations.
Heinz Neudecker (2000)
Qüestiió
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In this note a uniform transparent presentation of the scalar Haffian will be given. Some well-known results will be generalized. A link will be established between the scalar Haffian and the derivative matrix as developed by Magnus and Neudecker.