HP MLIB User's Guide Vol. 1 7th Ed.

Chapter 3 Basic Matrix Operations 239
Rank-1 update SGER/DGER/CGERC/CGERU/ZGERC/ZGERU
ZGERC, and in unconjugated form by the other
subprograms.
incy Increment for the array y, incy ≠ 0:
incy > 0 y is stored forward in array y; that is,
y
i
is stored in y((i−1)×incy+1).
incy < 0 y is stored backward in array y; that
is, y
i
is stored in y((i−n)×incy+1).
Use incy = 1 if the vector y is stored contiguously in
array y, that is, if y
i
is stored in y(i). Refer to “BLAS
Indexing Conventions” in the introduction to
Chapter 2.
a Array containing the m-by-n matrix A.
lda The leading dimension of array a as declared in the
calling program unit, with lda ≥ max(m,1).
Output a The updated A matrix replaces the input.