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Tag Archives: iterative solution
Solving the Lagrangian Point equation for the Moon
This post was prompted by a recent question at Fitting high order polynomials, asking for Excel methods to solve the equations for the radius of the Moon’s Lagrangian Point 1. All the methods described in this post have been added to … Continue reading
Posted in Excel, Maths, Newton, UDFs, VBA
Tagged Excel, iterative solution, Lagrangian point, Newton, polynomial solution, UDFs, VBA
3 Comments
Brent’s Method; Update and Examples
Brent’s Method is a refinement of Newton’s Method for the numerical solution of any equation with one variable. The User Defined Function (UDF) QuadBrent was described in: The Inverse Quadratic Method 3 – Brent’s Method Following a recent question, I have … Continue reading
Posted in Arrays, Excel, Maths, Newton, UDFs, VBA
Tagged Brents method, Excel, inverse quadratic, iterative solution, Maths, UDF, VBA
4 Comments
The Inverse Quadratic Method 3 – Brent’s Method
The previous post in this series presented iterative methods to solve polynomial equations using direct or inverse quadratic interpolation. These methods have two disadvantages: In some circumstances the function may converge very slowly, or not at all. The name of … Continue reading
Posted in Excel, Maths, UDFs, VBA
Tagged Excel, inverse quadratic, iterative solution, Maths, UDF, VBA
12 Comments