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Code Listing by David Terr

Code 1-10 of 11   Pages: Go to  1  2  Next >>  page  






This program returns the coefficients of the Legendre polynomial P_n, given n. The result is a row vector with powers of x decreasing from left to right (standard MATLAB notation). Like for other polynomials, LegendrePoly(n) can be evaluated at x by typing

polyval(LegendrePoly(n),x).



Wigner3j(j1,j2,j,m1,m2,m) returns the Wigner 3j-symbol, where j1, j2, j, m1, m2, and m are half-integers. Physically, the Wigner 3j-symbol is closely related to the Clebsch-Gordon coefficient <j1,j2,m1,m2|j1,j2,j,m>, the square of which is...



ClebschGordan(j1,j2,j,m1,m2,m) is the Clebsch-Gordan coefficient <j1,j2,m1,m2|j1,j2,j,m>. This is used in the theory of angular momentum in quantum mechanics.



For fixed integers a and b such that D = a^2 + 4*b is nonnegative, the sequence V_n = GeneralizedLucas(n,a,b) satisfies the recurrence
V_n = V_{n-1} + V_{n-2} and the initial conditions V_0 = 2 and V_1 = a. When a=b=1, this is the Lucas...



Given a nonnegative integer n, return the nth Lucas number. Return an error message if the argument is not an integer.



Archive containing various files pertaining to physics.



Archive containing numerical function files.



Given x from 0 to 1, this program computes ?(x), where ? is the Minkowski question mark function, defined by

?(0)=0, ?(1)=1, and ?((a+b)/(c+d))=
(?(a/c) + ?(b/d))/2, where a/b and c/d are consecutive terms in the Farey sequence....



For fixed integers a and b with D = a^2 + 4*b positive, the sequence U_n = GeneralizedFibonacci(n,a,b) satisfies the recurrence U_n = a U_{n-1} + b U_{n-2} with initial conditions U_0 = 0 and U_1 = 1. If a=b=1, this is the Fibonacci sequence.