4.7 psb_geasums — Generalized 1Norm of Vector
This subroutine computes a series of 1norms on the columns of a dense matrix
x:
This function computes the 1norm of a vector x.
If x is a real vector it computes 1norm as:
else if x is a complex vector then it computes 1norm as:
call psb_geasums(res, x, desc_a, info)



res  x  Subroutine 



Short Precision Real  Short Precision Real  psb_geasums 
Long Precision Real  Long Precision Real  psb_geasums 
Short Precision Real  Short Precision Complex  psb_geasums 
Long Precision Real  Long Precision Complex  psb_geasums 




Table 7: 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 7.

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
 contains the 1norm of (the columns of) x.
Scope: global
Intent: out.
Short as: a long precision real number. 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.