# psb_geamaxs — Generalized Infinity Norm

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#### 4.5 psb_geamaxs — Generalized Infinity Norm

This subroutine computes a series of infinity norms on the columns of a dense matrix x:

call psb_geamaxs(res, x, desc_a, info)

res | x | Subroutine

Short Precision Real | Short Precision Real | psb_geamaxs
Long Precision Real | Long Precision Real | psb_geamaxs
Short Precision Real | Short Precision Complex | psb_geamaxs
Long Precision Real | Long Precision Complex | psb_geamaxs

Table 5: Data types

Type:
  Synchronous.
On Entry
x
  the local portion of global dense matrix x.
  Scope: local
  Type: required
  Intent: in.
  Specified as: a rank one or two array or an object of type psb_T_vect_type containing numbers of type specified in Table 5.
desc_a
  contains data structures for communications.
  Scope: local
  Type: required
  Intent: in.
  Specified as: an object of type psb_desc_type.
On Return
res
  is the infinity norm of the columns of x.
  Scope: global
  Intent: out.
  Specified as: a number or a rank-one array of long precision real numbers.
info
  Error code.
  Scope: local
  Type: required
  Intent: out.
  An integer value; 0 means no error has been detected.

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