Lectures On the Theory of Maxima And Minima of Functions of Several Variables
The book Lectures On the Theory of Maxima And Minima of Functions of Several Variables was written by author Harris Hancock Here you can read free online of Lectures On the Theory of Maxima And Minima of Functions of Several Variables book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Lectures On the Theory of Maxima And Minima of Functions of Several Variables a good or bad book?
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, . . . . «n)» and consequently f {^x^, Xi, .... X^ has on the position (ai, a^. , . . . . A„) neither a maximum nor a minimum value. We therefore have as a second condition for the existence of a maximum or a minimum of the function XC^n -^21 • • • -^n) on the position («!, i?2>- • • -^n) that, in case the second derivatives of the function /"(j^i, ;i:2, . . . . ;i^„) do not all vanish at this position, the homogeneous quadratic form f^\\ dx^dx Iai, a2, an ' must be always negative or always p...ositive for arbitrary values of ^1, /^2, /?„. THEORY OF THE HOMOGENEOUS QUADRATIC FORMS. 8. There are two kinds of integral homogeneous functions of the second degree, or, as they are usually called, quadratic forms, viz. : I. , formce indefinita;'* which with real values of the vari- ables can become both positive and negative, and that, too, for values of the variables, whose absolute values do not exceed an arbitrarily small quantity; II. , formce definitce, which with real values of the variables have always the same sign.
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