# Name

**HPL_indxg2l** Map a global index into a local one.
# Synopsis

`#include "hpl.h"`

`int`

`HPL_indxg2l(`

`const int`

`IG`

,
`const int`

`INB`

,
`const int`

`NB`

,
`const int`

`SRCPROC`

,
`const int`

`NPROCS`

`);`

# Description

**HPL_indxg2l**
computes the local index of a matrix entry pointed to by
the global index IG. This local returned index is the same in all
processes.
# Arguments

IG (input) const int
On entry, IG specifies the global index of the matrix entry.
IG must be at least zero.

INB (input) const int
On entry, INB specifies the size of the first block of the
global matrix. INB must be at least one.

NB (input) const int
On entry, NB specifies the blocking factor used to partition
and distribute the matrix. NB must be larger than one.

SRCPROC (input) const int
On entry, if SRCPROC = -1, the data is not distributed but
replicated, in which case this routine returns IG in all
processes. Otherwise, the value of SRCPROC is ignored.

NPROCS (input) const int
On entry, NPROCS specifies the total number of process rows
or columns over which the matrix is distributed. NPROCS must
be at least one.

# See Also

HPL_indxg2lp,
HPL_indxg2p,
HPL_indxl2g,
HPL_numroc,
HPL_numrocI.