Vector-Vector Operations

In the following sections, no distinction is made between a column or a row of a matrix. Both are denoted by the word ``vector''. We define by

1. Vector swap: PSWAP( N, X, IX, JX, DESCX, INCX, Y, IY, JY, DESCY, INCY )

   Operation:

2. Vector scaling: PSCAL( N, ALPHA, X, IX, JX, DESCX, INCX )

   Operation:

3. Vector copy: PCOPY( N, X, IX, JX, DESCX, INCX, Y, IY, JY, DESCY, INCY )

   Operation:

4. Vector addition: PAXPY( N, ALPHA, X, IX, JX, DESCX, INCX, Y, IY, JY, DESCY, INCY )

   Operation:

5. Dot products: PDOT( N, DOT, X, IX, JX, DESCX, INCX, Y, IY, JY, DESCY, INCY )

   Operation: for the PSDOT, PDDOT, PCDOTU or PZDOTU routines, DOT

   For the PCDOTC or PZDOTC routines, DOT

6. Vector 2-norm: PNRM2( N, NORM2, X, IX, JX, DESCX, INCX )

   Operation: NORM2

7. Sum of absolute value of vector entries: PASUM( N, ASUM, X, IX, JX, DESCX, INCX )

   Operation: ASUM

8. Index and value of vector entry having maximum absolute value: PAMAX( N, AMAX, INDX, X, IX, JX, DESCX, INCX )

   Operation: