FUNCTION: tctubes - compute the mouths of the exceptional tubes of a tame concealed bound poset algebra

CALLING SEQUENCE:
tctubes(p)

PARAMETERS:
p - a bound poset algebra

SYNOPSIS:

• For a tame concealed bound poset algebra, the dimension vectors of the modules in the mouths of the exceptional tubes are computed.

• tctubes returns a list of lists, each list consisting of the dimension vectors of the mouth of one tube. The Auslander-Reiten translate of a module is given by the (cyclic) predecessor in the corresponding list.

EXAMPLES:

> d:=[7,{[1,3],[3,2,4],[4,5],[5,6],[7,5]}];

> l:=tctubes(d);

> l[1];

> l[2];

> l[3];