Singular Manual: Objects

| ### 3.5.4 Objects Every object in SINGULAR has a type and a value. In most cases it has also a name and in some cases an attribute list. The value of an object may be examined simply by printing it with a print command: object`;`. The type of an object may be determined by means of the `typeof` function, the attributes by means of the `attrib` function ( typeof, attrib):
      ring r=0,x,dp;
      typeof(10);
    ==> int
      typeof(10000000000000000);
    ==> bigint
      typeof(r);
    ==> ring
      attrib(x);
    ==> no attributes
      attrib(std(ideal(x)));
    ==> attr:isSB, type int
Each object of type `poly`, `ideal`, `vector`, `module`, `map`, `matrix`, `number`, or `resolution` belongs to a specific ring. This is also true for `list`, if at least one of the objects contained in the list belongs to a ring. These objects are local to the ring. Their names can be duplicated for other objects in other rings. Objects from one ring can be mapped to another ring using maps or the commands `fetch` or `imap`. See map, fetch, imap. All other types do not belong to a ring and can be accessed within every ring and across rings. They can be declared even if there is no active basering.

User manual for Singular version 4-1-0p2, 2017, generated by texi2html.