Python

💡 Problem Formulation: In scientific computing, it is often necessary to evaluate a Legendre series—a series of Legendre polynomials—given a set of coefficients. This article tackles the problem of evaluating such a series at multiple points ‘x’, broadcast over the coefficient matrix in Python. Imagine having a coefficient matrix where each column represents a different … 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: You’re tasked with evaluating the values of a Legendre polynomial series at a given set of points x in Python. Given coefficients of the Legendre series and points x, your goal is to compute the series’ sum at each point. For example, if the input is coefficients [c0, c1, …, cn] and … 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

Raising Legendre Series to a Power in Python 💡 Problem Formulation: When working with orthogonal polynomials in Python, a common task is to take a Legendre series—a sequence of coefficients for Legendre polynomials—and raise it to a power. This involves finding a new series that represents the polynomial resulting from raising the original Legendre polynomial … 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: You may need to integrate a Hermite series—a weighted sum of Hermite polynomial functions—while working with statistical models or solving physics-related problems in quantum mechanics. Let’s say the series is defined by coefficients c_n for each Hermite polynomial H_n(x). The task is to calculate the integral of the series over a specified … 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: Given an array of floating point coordinates (x, y, z), the objective is to generate a pseudo Vandermonde matrix using the Laguerre polynomials. The Vandermonde matrix is a matrix with the terms of a geometric progression in each row, which, in our case, links to the evaluation of the Laguerre polynomials at … Read more

💡 Problem Formulation: Pseudo-Vandermonde matrices are a generalization of classical Vandermonde matrices, which play a significant role in interpolation problems, least squares fitting, and numeric analysis. Specifically, this article tackles the generation of such matrices where columns correspond to Laguerre polynomials evaluated at given x, y, z sample points. The desired output is a matrix … Read more

💡 Problem Formulation: When working with Legendre polynomials in numerical and computational applications, it is sometimes necessary to divide one Legendre series by another. This operation can be challenging due to the nature of these polynomials. For instance, if we have two Legendre series represented by P3(x) and P4(x), our goal is to find a … Read more

💡 Problem Formulation: The task is to find effective methods for multiplying two Legendre series in Python. Legendre series, composed of coefficients corresponding to Legendre polynomials, are used in various numerical computations and approximations. Given two Legendre series, e.g., [a0, a1, a2] and [b0, b1, b2], the goal is to calculate the product series, which … Read more