Download A Numerical Library in C for Scientists and Engineers by H. T. Lau PDF

By H. T. Lau

This can be a large library of c workouts to just do approximately something. the one sore spots are a few of the vector and matrix exercises. they're divided up in order that a few extremely simple operations require numerous exercises. in fact this used to be performed for flexibility, yet a few may possibly locate that writing their very own is extra effective. additionally, the 2 aspect boundary worth challenge solvers are very constrained and the DE part in basic terms includes consistent time-step solvers. The precise functionality part is superb, although. however, regardless of the constraints, i've got came upon this to be a gold mine of workouts and an exceptionally worthwhile ebook. i will usually locate stuff right here that's virtually very unlikely to discover in other places.

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Function Parameters: void hshcolmat (Ir, ur, lc, uc, i,x,u,a) int; lower and upper row indices; r r : Ic,uc: int; lower and upper column indices; i: int; the column index of the Householder vector; x: float; the Householder constant; u: float u[lr:ur, i:i]; the Householder vector; the matrix to be premultiplied by the Householder matrix. a: float a[lr:ur,lc:uc]; Functions used: tammat, elmcol. void hshcolmat(int lr, int ur, int lc, int uc, int i, float x, float **u, float **a) I1 void elmcol (int, int, int, int, float **, float **, float); float tammat(int, int, int, int, float **, float * * I ; for (; lc<=uc; lc++) elmcol (lr,ur,lc,i,a,u,tammat (lr,ur,lc,i,a,u)*x) ; 1 C.

A: float a[lr:ur,lc:uc]; Functions used: matmat, elmcolrow. ,uc), u,-,+, =u, (i=lc,. , uc) . Function Parameters: void hshvectam (Ir, ur,lc, uc,x,u,a) int; lower and upper row indices; r r : lc,uc: int; lower and upper column indices; x: float; the Householder constant; u: float u[lc:uc]; the Householder vector; the matrix to be postmultiplied by the Householder matrix. a: float a[lr:ur,lc:uc]; Functions used: matvec, elrnrowvec. void hshvectam(int lr, int ur, int lc, int uc, float x, float u[l, float **a) { float matvec (int, int, int, float **, float [I) ; void elmrowvec (int, int, int, float * * , float [ I , float); for ; lrc=ur; lr++) elmrowvec (lc,uc,lr,a,u,matvec(lc,uc,lr,a,u)* x ) ; 1 E.

O; * *si); 1 . 16 Complex vector and matrix - Norms comeucnrm Computes the Euclidean norm of the nxn complex band matrix a for which aij=O when I i-j I >Iw. Function Parameters: float comeucnrm (ar,ai, lw,n) float; delivers the Euclidean norm of matrix a with Iw codiagonals, value of p above; n: int; the order of the matrix; lw: int; the number of lower codiagonals; ar,ai: float ar[l:n, l:n],ai[l:n, l:n]; the real part and imaginary part of the complex matrix with Iw lower codiagonals. comeucnrm: Function used: mattam.

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