FUNCTION: Part2Border - border of a given partition

CALLING SEQUENCE:

Part2Border(part)

PART[Part2Border](part)

PARAMETERS:

part = a partition

SYNOPSIS:

• The Part2Border function gives the north-east border of the diagram of a partition part.

• The border is a list of 0 (horizontal steps) and 1 (vertical steps).

• The following option is available:
  'alphabet' = m where m is a list of length 2, returns the same, m[1] denoting horizontal steps, m[2] vertical ones.

• Whenever there is a conflict between the function name Part2Border and another name used in the same session, use the long form PART['Part2Border'].

EXAMPLES:

> with(PART):
> Part2Border([6,4,4,2,1]);
 
                       [0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1]
 
> Part2Border([6,4,4,2,1], 'alphabet'=[a,b]);
 
                       [a, b, a, b, a, a, b, b, a, a, b]