Absolute value functionUniform smoothing approximation functionSingular valueSmoothing Newton methodWe investigate the NP-hard absolute value equation (AVE) Ax â |x|=b, where A is an arbitrary square matrix whose singular values exceed one. The significance of the absolute value equations ...
underestimate,underestimation,underrating,underreckoning- an estimation that is too low; an estimate that is less than the true or actual value 2.approximation- the quality of coming near to identity (especially close in quantity) similarity- the quality of being similar ...
a type of approximation of a function. In uniform approximation, the “distance” on a given set between the given function f(x) and the approximating function P(x) is measured by the least upper bound of the absolute value of their difference. For example, the distance between the continuo...
The main purpose of this paper is to provide an easy-to-use approximation formula for the inverse Langevin function. The mathematical complexity of this function makes it unfeasible for an analytical manipulation and inconvenient for computer simulation. This situation has motivated a series of papers...
The absolute value of the ellipticity is given by the dotted curve. The short and long paths are indicated by odd and even numbers, respectively.Figure adapted from Sansone (2009). Show moreView chapter Chapter Advances in Atomic, Molecular, and Optical Physics Advances In Atomic, Molecular, ...
This dissertation describes three contributions in the area of sparse value function approximation for reinforcement learning.;One method for obtaining sparse linear approximations is the inclusion in the objective function of a penalty on the sum of the absolute values of the approximation weights. ...
valid= checkGradients(fun,x0)compares the value of the supplied first derivative function infunat a point nearx0against a finite-difference approximation. By default, the comparison assumes that the function is an objective function. To check constraint functions, set theIsConstraintname-value argume...
Because TM + 1(x) oscillates with amplitude one in the expansion interval, the maximum excursion of the absolute error in this interval is approximately equal to | aM + 1|. Example 8.8 Function approximation using Chebyshev polynomials. Suppose we wish to approximate function f(x) = In(1 +...
Let χ be a positive, monotonic increasing function of t such that |t|αχ(1|t|)→0 as t→0. A continuous function f ∈ Hα(χ)[0,1) if f satisfies the inequality |f(x+t)−f(x)|=O(|t|αχ(1|t|)), for 0<α≤1 and ∀ x, t, x+t∈[0,1). Remark It is imp...
Chebfun's REMEZ command, written by Ricardo Pachon, can compute best (i.e. infinity-norm or minimax) approximations of a real function on a real interval. For example, here is an absolute value function on [-1,1] and its best approximation by a polynomial of degree 10: ...