openInterval -- computes the subposet contained strictly between two points

Synopsis

• Usage:

  I = openInterval(P, a, b)

• Inputs:

  • P, an object of class Poset
  • a, a thing, an element of the poset
  • b, a thing, an element of the poset
• Outputs:

  • I, an object of class Poset, the open interval in P between a and b

Description

i1 : P = booleanLattice 3;

i2 : openInterval(P, "001", "111")

o2 = Relation Matrix: | 1 0 |
                      | 0 1 |

o2 : Poset

See also

• closedInterval -- computes the subposet contained between two points