let n3, n4, n5, n2, n1 be Element of NAT ; :: thesis: for S being Gene-Set
for p1, p2 being Individual of S holds
( crossover p1,p2,0 ,0 ,n3,n4,n5 = crossover p1,p2,n3,n4,n5 & crossover p1,p2,0 ,n2,0 ,n4,n5 = crossover p1,p2,n2,n4,n5 & crossover p1,p2,0 ,n2,n3,0 ,n5 = crossover p1,p2,n2,n3,n5 & crossover p1,p2,0 ,n2,n3,n4,0 = crossover p1,p2,n2,n3,n4 & crossover p1,p2,n1,0 ,0 ,n4,n5 = crossover p1,p2,n1,n4,n5 & crossover p1,p2,n1,0 ,n3,0 ,n5 = crossover p1,p2,n1,n3,n5 & crossover p1,p2,n1,0 ,n3,n4,0 = crossover p1,p2,n1,n3,n4 & crossover p1,p2,n1,n2,0 ,0 ,n5 = crossover p1,p2,n1,n2,n5 & crossover p1,p2,n1,n2,0 ,n4,0 = crossover p1,p2,n1,n2,n4 & crossover p1,p2,n1,n2,n3,0 ,0 = crossover p1,p2,n1,n2,n3 )

let S be Gene-Set; :: thesis: for p1, p2 being Individual of S holds
( crossover p1,p2,0 ,0 ,n3,n4,n5 = crossover p1,p2,n3,n4,n5 & crossover p1,p2,0 ,n2,0 ,n4,n5 = crossover p1,p2,n2,n4,n5 & crossover p1,p2,0 ,n2,n3,0 ,n5 = crossover p1,p2,n2,n3,n5 & crossover p1,p2,0 ,n2,n3,n4,0 = crossover p1,p2,n2,n3,n4 & crossover p1,p2,n1,0 ,0 ,n4,n5 = crossover p1,p2,n1,n4,n5 & crossover p1,p2,n1,0 ,n3,0 ,n5 = crossover p1,p2,n1,n3,n5 & crossover p1,p2,n1,0 ,n3,n4,0 = crossover p1,p2,n1,n3,n4 & crossover p1,p2,n1,n2,0 ,0 ,n5 = crossover p1,p2,n1,n2,n5 & crossover p1,p2,n1,n2,0 ,n4,0 = crossover p1,p2,n1,n2,n4 & crossover p1,p2,n1,n2,n3,0 ,0 = crossover p1,p2,n1,n2,n3 )

let p1, p2 be Individual of S; :: thesis: ( crossover p1,p2,0 ,0 ,n3,n4,n5 = crossover p1,p2,n3,n4,n5 & crossover p1,p2,0 ,n2,0 ,n4,n5 = crossover p1,p2,n2,n4,n5 & crossover p1,p2,0 ,n2,n3,0 ,n5 = crossover p1,p2,n2,n3,n5 & crossover p1,p2,0 ,n2,n3,n4,0 = crossover p1,p2,n2,n3,n4 & crossover p1,p2,n1,0 ,0 ,n4,n5 = crossover p1,p2,n1,n4,n5 & crossover p1,p2,n1,0 ,n3,0 ,n5 = crossover p1,p2,n1,n3,n5 & crossover p1,p2,n1,0 ,n3,n4,0 = crossover p1,p2,n1,n3,n4 & crossover p1,p2,n1,n2,0 ,0 ,n5 = crossover p1,p2,n1,n2,n5 & crossover p1,p2,n1,n2,0 ,n4,0 = crossover p1,p2,n1,n2,n4 & crossover p1,p2,n1,n2,n3,0 ,0 = crossover p1,p2,n1,n2,n3 )
A1: ( crossover p1,p2,0 ,n2,n3,n4,0 = crossover (crossover p1,p2,0 ,n2,n3,n4),(crossover p1,p2,n2,n3,n4),0 & crossover p1,p2,n1,0 ,n3,n4,0 = crossover (crossover p1,p2,n1,0 ,n3,n4),(crossover p1,p2,n1,n3,n4),0 ) by Th29;
A2: ( crossover p1,p2,n1,n2,0 ,n4,0 = crossover (crossover p1,p2,n1,n2,0 ,n4),(crossover p1,p2,n1,n2,n4),0 & crossover p1,p2,n1,n2,n3,0 ,0 = crossover (crossover p1,p2,n1,n2,n3,0 ),(crossover p1,p2,n1,n2,n3),0 ) by Th29;
A3: crossover p1,p2,n1,0 ,n3,0 ,n5 = crossover (crossover p1,p2,n1,n3),(crossover p2,p1,n1,0 ,n3,0 ),n5 by Th30
.= crossover (crossover p1,p2,n1,n3),(crossover p2,p1,n1,n3),n5 by Th30 ;
A4: crossover p1,p2,n1,0 ,0 ,n4,n5 = crossover (crossover p1,p2,n1,n4),(crossover p2,p1,n1,0 ,0 ,n4),n5 by Th30
.= crossover (crossover p1,p2,n1,n4),(crossover p2,p1,n1,n4),n5 by Th30 ;
A5: crossover p1,p2,n1,n2,0 ,0 ,n5 = crossover (crossover p1,p2,n1,n2),(crossover p2,p1,n1,n2,0 ,0 ),n5 by Th30
.= crossover (crossover p1,p2,n1,n2),(crossover p2,p1,n1,n2),n5 by Th30 ;
A6: crossover p1,p2,0 ,n2,n3,0 ,n5 = crossover (crossover p1,p2,n2,n3),(crossover p2,p1,0 ,n2,n3,0 ),n5 by Th30
.= crossover (crossover p1,p2,n2,n3),(crossover p2,p1,n2,n3),n5 by Th30 ;
A7: crossover p1,p2,0 ,n2,0 ,n4,n5 = crossover (crossover p1,p2,n2,n4),(crossover p2,p1,0 ,n2,0 ,n4),n5 by Th30
.= crossover (crossover p1,p2,n2,n4),(crossover p2,p1,n2,n4),n5 by Th30 ;
crossover p1,p2,0 ,0 ,n3,n4,n5 = crossover (crossover p1,p2,n3,n4),(crossover p2,p1,0 ,0 ,n3,n4),n5 by Th30
.= crossover (crossover p1,p2,n3,n4),(crossover p2,p1,n3,n4),n5 by Th30 ;
hence ( crossover p1,p2,0 ,0 ,n3,n4,n5 = crossover p1,p2,n3,n4,n5 & crossover p1,p2,0 ,n2,0 ,n4,n5 = crossover p1,p2,n2,n4,n5 & crossover p1,p2,0 ,n2,n3,0 ,n5 = crossover p1,p2,n2,n3,n5 & crossover p1,p2,0 ,n2,n3,n4,0 = crossover p1,p2,n2,n3,n4 & crossover p1,p2,n1,0 ,0 ,n4,n5 = crossover p1,p2,n1,n4,n5 & crossover p1,p2,n1,0 ,n3,0 ,n5 = crossover p1,p2,n1,n3,n5 & crossover p1,p2,n1,0 ,n3,n4,0 = crossover p1,p2,n1,n3,n4 & crossover p1,p2,n1,n2,0 ,0 ,n5 = crossover p1,p2,n1,n2,n5 & crossover p1,p2,n1,n2,0 ,n4,0 = crossover p1,p2,n1,n2,n4 & crossover p1,p2,n1,n2,n3,0 ,0 = crossover p1,p2,n1,n2,n3 ) by A7, A6, A4, A3, A1, A5, A2, Th4; :: thesis: verum