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Macaulay2 web site
Posets
::
posetMeet
posetMeet -- determines the meet for two elements of a poset
Synopsis
Usage:
m = posetMeet(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:
m
,
a
thing
, the greatest element less than both
a
and
b
, if it exists
Description
The meet of
a
and
b
in
P
, if it exists, is the unique greatest element less than both
a
and
b
.
i1 : B = booleanLattice 3;
i2 : posetMeet(B, "011", "110") o2 = {010} o2 : List
See also
meetExists
-- determines if the meet exists for two elements of a poset
posetJoin
-- determines the join for two elements of a poset
Ways to use
posetMeet
:
posetMeet(Poset,Thing,Thing)