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5.1.1 attrib

Syntax:
attrib ( name )
Type:
none
Purpose:
displays the attribute list of the object called name.
Example:
 
Syntax:
attrib ( name , string_expression )
Type:
any
Purpose:
returns the value of the attribute string_expression of the variable name. If the attribute is not defined for this variable, attrib returns the empty string.
Example:
 
Syntax:
attrib ( name, string_expression, expression )
Type:
none
Purpose:
sets the attribute string_expression of the variable name to the value expression.
Example:
 
Remark:
An attribute may be described by any string_expression. Some of these are used by the kernel of SINGULAR and referred to as reserved attributes. Non-reserved attributes may be used, however, in procedures and can considerably speed up computations.
Reserved attributes:
(isSB, isHomog are used by the kernel, the other are used by libraries)
isSB
the standard basis property is set by all commands computing a standard basis like groebner, std, stdhilb etc.; used by lift, dim, degree, mult, hilb, vdim, kbase
isHomog
the weight vector for homogeneous or quasihomogeneous ideals/modules
isCI
complete intersection property
isCM
Cohen-Macaulay property
rank
set the rank of a module (see nrows)
withSB
value of type ideal, resp. module, is std
withHilb
value of type intvec is hilb(_,1) (see hilb)
withRes
value of type list is a free resolution
withDim
value of type int is the dimension (see dim)
withMult
value of type int is the multiplicity (see mult)

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            User manual for Singular version 3-1-6, Dec 2012, generated by texi2html.