the basis `@O` of indec. projective Lambda-modules:
O, O(x1),O(2x1),..,O((p1-1)x1), ... , O(xt),..,O((pt-1)xt), O(c)
the basis `@E` of simple Lambda-modules:
chosen subject to the same order as for the indec. projective Lambda-modules above, where each indec. projective module is replaced by the corresponding(!) simple module.
the "simple sheaves" basis `@S`:
O, S1,1,S1,2,..,S1,p1-1, ... , St,1,..,St,pt-1, S
where Si,j denotes the cokernel of O(j xi) ---> O((j+1)xi) .
For the t u b u l a r canonical algebras there is a special datatype "tub_enc" encoding objects with respect to the tubular family and their position within it; one of the central aspects of the TUBULAR package is the conversion between this data type and ordinary class representation "quiver" described above.