for L being non empty OrthoLattStr holds
( L is Ortholattice iff ( ( for a, b, c being Element of L holds (a "\/" b) "\/" c = (((c `) "/\" (b `)) `) "\/" a ) & ( for a, b being Element of L holds a = a "/\" (a "\/" b) ) & ( for a, b being Element of L holds a = a "\/" (b "/\" (b `)) ) ) )