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Implicit function information


In mathematics, an implicit equation is a relation of the form where R is a function of several variables (often a polynomial). For example, the implicit equation of the unit circle is

An implicit function is a function that is defined by an implicit equation, that relates one of the variables, considered as the value of the function, with the others considered as the arguments.[1]: 204–206  For example, the equation of the unit circle defines y as an implicit function of x if −1 ≤ x ≤ 1, and y is restricted to nonnegative values.

The implicit function theorem provides conditions under which some kinds of implicit equations define implicit functions, namely those that are obtained by equating to zero multivariable functions that are continuously differentiable.

  1. ^ Chiang, Alpha C. (1984). Fundamental Methods of Mathematical Economics (Third ed.). New York: McGraw-Hill. ISBN 0-07-010813-7.

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Implicit function

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mathematics, an implicit equation is a relation of the form R ( x 1 , … , x n ) = 0 , {\displaystyle R(x_{1},\dots ,x_{n})=0,} where R is a function of several...

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Implicit function theorem

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In multivariable calculus, the implicit function theorem is a tool that allows relations to be converted to functions of several real variables. It does...

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Inverse function theorem

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proof is quite similar to the proof of the implicit function theorem and, in fact, the implicit function theorem can be also used instead.) More generally...

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Function of several real variables

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vectors and column vectors of multivariable functions, see matrix calculus. A real-valued implicit function of several real variables is not written in...

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Differential calculus

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(These two functions also happen to meet (−1, 0) and (1, 0), but this is not guaranteed by the implicit function theorem.) The implicit function theorem...

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Function of a real variable

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using theorem differentiation under the integral sign. A real-valued implicit function of a real variable is not written in the form "y = f(x)". Instead...

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Implicit surface

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set of zeros of a function of three variables. Implicit means that the equation is not solved for x or y or z. The graph of a function is usually described...

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Implicit

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Look up implicit in Wiktionary, the free dictionary. Implicit may refer to: Implicit function Implicit function theorem Implicit curve Implicit surface...

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Triple product rule

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three variables can be related by a function of the form f(x, y, z) = 0, so each variable is given as an implicit function of the other two variables. For...

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Nash embedding theorems

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Ck- case was later extrapolated into the h-principle and Nash–Moser implicit function theorem. A simpler proof of the second Nash embedding theorem was...

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Inverse function

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Amazigo, John C.; Rubenfeld, Lester A. (1980). "Implicit Functions; Jacobians; Inverse Functions". Advanced Calculus and its Applications to the Engineering...

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Glossary of calculus

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{\displaystyle x^{2}+y^{2}-1=0} . An implicit function is a function that is defined implicitly by an implicit equation, by associating one of the variables...

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Algebraic function

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the function implicitly defined by f ( x ) 5 + f ( x ) + x = 0 {\displaystyle f(x)^{5}+f(x)+x=0} . In more precise terms, an algebraic function of degree...

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Memory

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understood as an informational processing system with explicit and implicit functioning that is made up of a sensory processor, short-term (or working) memory...

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Implicit curve

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for some function F of two variables. Hence an implicit curve can be considered as the set of zeros of a function of two variables. Implicit means that...

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Eigenvalue perturbation

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we shall use the Implicit function theorem (Statement of the theorem ); we notice that for a continuously differentiable function f : R n + m → R m ...

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Hyperparameter optimization

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differentiation. A more recent work along this direction uses the implicit function theorem to calculate hypergradients and proposes a stable approximation...

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Multivalued function

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{\displaystyle z=a} . This is the case for functions defined by the implicit function theorem or by a Taylor series around z = a {\displaystyle z=a} . In...

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Inverse function rule

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derivatives of functions Implicit function theorem – On converting relations to functions of several real variables Integration of inverse functions – Mathematical...

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Nash functions

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Nash functions are those functions needed in order to have an implicit function theorem in real algebraic geometry. Along with Nash functions one defines...

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Manifold

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continuously differentiable function between Euclidean spaces that satisfies the nondegeneracy hypothesis of the implicit function theorem. In the third section...

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Curvature

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from the expression of the curvature of the graph of a function by using the implicit function theorem and the fact that, on such a curve, one has d y...

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Superellipsoid

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{\displaystyle f(x,y,z)>1} . Therefore, the implicit function is also called the inside-outside function of the superellipsoid. The superellipsoid has...

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