Usage
f15.3.3(A, B, C, z, tol = 0, maxiter = 2000)
f15.3.4(A, B, C, z, tol = 0, maxiter = 2000)
f15.3.5(A, B, C, z, tol = 0, maxiter = 2000)
f15.3.6(A, B, C, z, tol = 0, maxiter = 2000)
f15.3.7(A, B, C, z, tol = 0, maxiter = 2000)
f15.3.8(A, B, C, z, tol = 0, maxiter = 2000)
f15.3.9(A, B, C, z, tol = 0, maxiter = 2000)