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#### 4.10 psb_norm1 — 1-Norm of Sparse Matrix

This function computes the 1-norm of a matrix A:

where:

A
  represents the global matrix A

A | Function
Short Precision Real | psb_spnrm1
Long Precision Real | psb_spnrm1
Short Precision Complex | psb_spnrm1
Long Precision Complex | psb_spnrm1

Table 10: Data types

    psb_spnrm1(A, desc_a, info)
    psb_norm1(A, desc_a, info)

Type:
  Synchronous.
On Entry
a
  the local portion of the global sparse matrix A.
  Scope: local
  Type: required
  Intent: in.
  Specified as: an object of type psb_Tspmat_type.
desc_a
  contains data structures for communications.
  Scope: local
  Type: required
  Intent: in.
  Specified as: an object of type psb_desc_type.
On Return
Function value
  is the 1-norm of sparse submatrix A.
  Scope: global
  Specified as: a long precision real number.
info
  Error code.
  Scope: local
  Type: required
  Intent: out.
  An integer value; 0 means no error has been detected.

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