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The vector potential admitted by a solenoidal field is not unique. If A {\displaystyle \mathbf {A} } is a vector potential for v {\displaystyle \mathbf {v} } , then so is A + ∇ f , {\displaystyle \mathbf {A} +\nabla f,} where f {\displaystyle f} is any continuously differentiable scalar function.
Symbolab is an answer engine [1] that provides step-by-step solutions to mathematical problems in a range of subjects. [2] It was originally developed by Israeli start-up company EqsQuest Ltd., under whom it was released for public use in 2011. In 2020, the company was acquired by American educational technology website Course Hero. [3] [4]
Given a simply connected and open subset D of and two functions I and J which are continuous on D, an implicit first-order ordinary differential equation of the form (,) + (,) =,is called an exact differential equation if there exists a continuously differentiable function F, called the potential function, [1] [2] so that
The step potential is simply the product of V 0, the height of the barrier, and the Heaviside step function: = {, <, The barrier is positioned at x = 0, though any position x 0 may be chosen without changing the results, simply by shifting position of the step by −x 0.
A mathematical function, whose values are given by a scalar potential or vector potential; The electric potential, in the context of electrodynamics, is formally described by both a scalar electrostatic potential and a magnetic vector potential; The class of functions known as harmonic functions, which are the topic of study in potential theory
The notation convention chosen here (with W 0 and W −1) follows the canonical reference on the Lambert W function by Corless, Gonnet, Hare, Jeffrey and Knuth. [3]The name "product logarithm" can be understood as follows: since the inverse function of f(w) = e w is termed the logarithm, it makes sense to call the inverse "function" of the product we w the "product logarithm".
In calculus, Newton's method (also called Newton–Raphson) is an iterative method for finding the roots of a differentiable function, which are solutions to the equation =. However, to optimize a twice-differentiable f {\displaystyle f} , our goal is to find the roots of f ′ {\displaystyle f'} .
Scalar potential is not determined by the vector field alone: indeed, the gradient of a function is unaffected if a constant is added to it. If V is defined in terms of the line integral, the ambiguity of V reflects the freedom in the choice of the reference point r 0 .