
theorem
  for L be transitive antisymmetric with_infima RelStr for a,b,c being
  Element of L holds c <= a"/\"b implies c <= a
proof
  let L be transitive antisymmetric with_infima RelStr;
  let a,b,c be Element of L;
A1: a"/\"b <= a by YELLOW_0:23;
  assume c <= a"/\"b;
  hence thesis by A1,YELLOW_0:def 2;
end;
