Emily Rosemary Collins

💡 Problem Formulation: When working with orthogonal polynomials in numerical methods or spectral analysis, one may encounter Laguerre series. These series represent functions as linear combinations of Laguerre polynomials. The task is to convert such a series into a standard polynomial form. For instance, given a Laguerre series defined by coefficients [2, 1, 3], the … Read more

💡 Problem Formulation: When working with Laguerre polynomials in Python, it’s common to encounter situations where small trailing coefficients may be negligible and can be discarded to simplify the polynomial. This article demonstrates multiple techniques to remove such coefficients effectively. Given an input Laguerre polynomial, for example, L(x) = 0.1x^3 + 2.5x^2 + 0.0001x + … Read more

💡 Problem Formulation: A pseudo Vandermonde matrix for Hermite polynomials is computed from a set of points and involves evaluating Hermite polynomials at those points to create the matrix. The input is a float array of point coordinates, e.g., [1.0, 3.5, 5.2]. The desired output is a matrix where each column is the evaluation of … Read more

💡 Problem Formulation: A Vandermonde matrix is a square matrix with the terms of a geometric progression in each row. When dealing with Hermite polynomials, a pseudo-Vandermonde matrix incorporates the values derived from these polynomials. This article will demonstrate how to generate such a matrix in Python, starting with a sequence of points (e.g., x … Read more

💡 Problem Formulation: This article tackles the challenge of generating a Vandermonde matrix, specifically for Hermite polynomials, using a complex array of points as its input. The goal is to compute a matrix where each row represents an increasing degree of the Hermite polynomial evaluated at each point in the complex array. For example: given … Read more

💡 Problem Formulation: Integrating a Hermite series along a particular axis in Python refers to computing the antiderivative or integral of a series expansion expressed in terms of Hermite polynomials. In this case, we focus on integrating over axis 1 (columns) of a 2D array. For example, given a 2D array representing the coefficients of … Read more

💡 Problem Formulation: When working with Hermite polynomial series in Python, one might need to perform integration over a specific axis of a multidimensional array. This operation is crucial in fields like computational physics and statistics, where Hermite polynomials are a central mathematical tool. Consider having a two-dimensional array representing a series of Hermite polynomial … Read more

💡 Problem Formulation: In computational mathematics, evaluating a 3D Laguerre series on the cartesian product of coordinates x, y, and z involves calculating a value using a four-dimensional array of coefficients. Specifically, we want to determine the sum of Laguerre polynomial products across the three variables using the given coefficients. For example, given arrays of … Read more

💡 Problem Formulation: In numerical analysis and signal processing, generating polynomial series from specified roots is a common task. For example, we might want to create a Laguerre polynomial, a series used in physics and engineering, which is defined by its roots. Having a set of roots like [1, 2, 3], we seek to construct … Read more

💡 Problem Formulation: When working with polynomials in scientific computing, one may often need to calculate the integral of a Laguerre series—polynomials orthogonal with respect to the weight function e^(-x) on the interval [0, ∞). Specifically, integrating over axis 0 refers to performing the operation over the first dimension of a multidimensional array, which is … Read more

💡 Problem Formulation: In advanced calculus and computational mathematics, calculating the derivative of a function is a fundamental operation. When dealing with a Laguerre series—a tool often used for approximating functions—with coefficients that span multiple dimensions, the task can become more complex. Specifically, this article looks at differentiating such a series across axis 1 in … Read more

💡 Problem Formulation: In computational mathematics, differentiating polynomial series such as Laguerre series can lead to significant insights in various applications. For multidimensional coefficient arrays, being able to differentiate across a specific axis is crucial for correct analysis and results interpretation. This article addresses how to differentiate a Laguerre series, represented by a multidimensional coefficient … Read more