banfac banslv bint4 bintk bspldr bsplev bsplpp bsplvd bsplvn bvalue interv ppvalu

banslv() void banslv ( int  n, int  kl, int  ku, int  ldab, double  ab[], double  b[], int *  info  ) Solution of LU factorized system of linear equations (support routine for bint4 and bintk) Purpose This routine computes the solution x of the linear system Ax = b in place of b, given the LU factorization of A from banfac. banslv is used to compute the B-spline coefficients by solving the system of linear equations. banfac and banslv are the support routines for bint4 and bintk. Parameters [in] n Number of linear equations, i.e., order of the matrix A. (n >= 1) [in] kl Number of sub-diagonals within the band of A. (kl >= 0) [in] ku Number of super-diagonals within the band of A. (ku >= 0) [in] ldab Leading dimension of the two dimensional array ab[][]. (ldab >= kl + 1 + ku) [in] ab[][] Array ab[lab][ldab] (lab >= n) The LU factorized banded coefficient matrix of the linear system by banfac. [in,out] b[] Array b[lb] (lb >= n) [in] Right side of the system to be solved. [out] Solution vector. [out] info = 0: Successful exit = -1: The argument n had an illegal value (n < 1) = -2: The argument kl had an illegal value (kl < 0) = -3: The argument ku had an illegal value (ku < 0) = -4: The argument ldab had an illegal value (ldab < kl + 1 + ku) Reference SLATEC