The use of polynomial partial derivative
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V. Ramachandran; M.O. Ahmad
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Article
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1985
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Elsevier Science
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English
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A m&variable positive realfunction whose polynomial partial deriuative is a sum of a resistance and a mult~variable reuctancefunction is discussed. It is shown that the input impedance of certain doubly-terminated multivariable lossless networks satisfy this property. ## Necessary and su~~ient ~ond