Equation Icon  ( ) ( ) 1 0 0 0 0 0 0 0 0 0 | 0 − 1 0 0 0| | 0 1 0 0 0| || || || || H1 = | 0 0 0 0 0| , H2 = | 0 0 − 1 0 0| , ( 0 0 0 0 0) ( 0 0 0 0 0) 0 0 0 0 0 0 0 0 0 0 ( ) ( ) (6.84 ) 0 0 0 0 0 0 0 0 0 0 | 0 0 0 0 0| | 0 0 0 0 0| || || || || H3 = | 0 0 1 0 0| , H4 = | 0 0 0 0 0| , ( 0 0 0 − 1 0) ( 0 0 0 1 0) 0 0 0 0 0 0 0 0 0 − 1