----- Otter 3.0.4, August 1995 ----- The job was started by mccune on gyro, Wed Nov 1 22:02:37 1995 ----> UNIT CONFLICT at 0.41 sec ----> 145 [binary,143.1,1.1] -> . Length of proof is 16. Level of proof is 9. ---------------- PROOF ---------------- 1 [] beta=alpha -> . 3 [] -> x* ((((x*y@ )*y)@ *z)* ((alpha*u)@ * (beta*u)))=z. 5 [] -> x@ *x=y@ *y. 6 [] -> x@ * (x*y)=y. 8 [] -> (x*y)*y@ =x. 11 [para_into,3.1.1.2.2.1.1,3.1.1] -> x* ((((x*y@ )*y)@ *z)* (u@ * (beta* ((((alpha*v@ )*v)@ *u)* ((alpha*w)@ * (beta*w))))))=z. 19,18 [para_into,6.1.1.2,3.1.1,flip.1] -> (((x*y@ )*y)@ *z)* ((alpha*u)@ * (beta*u))=x@ *z. 23 [back_demod,11,demod,19] -> x* ((((x*y@ )*y)@ *z)* (u@ * (beta* (alpha@ *u))))=z. 26 [back_demod,3,demod,19] -> x* (x@ *y)=y. 31,30 [para_into,8.1.1.1,6.1.1] -> x* (y*x)@ =y@ . 35,34 [para_from,26.1.1,8.1.1.1,demod,31] -> x@ @ =x. 37,36 [para_from,34.1.1,8.1.1.2] -> (x*y@ )*y=x. 40 [back_demod,23,demod,37] -> x* ((x@ *y)* (z@ * (beta* (alpha@ *z))))=y. 48 [para_from,5.1.1,26.1.1.2] -> x* (y@ *y)=x. 52 [para_into,36.1.1.1,5.1.1,demod,35] -> (x@ *x)*y=y. 55,54 [para_into,48.1.1.2.1,34.1.1] -> x* (y*y@ )=x. 61,60 [para_into,52.1.1.1.1,34.1.1] -> (x*x@ )*y=y. 70 [para_from,54.1.1,26.1.1.2] -> x*x@ =y*y@ . 84 [para_into,40.1.1.2.1,70.1.1,demod,61,35] -> x* (y@ * (beta* (alpha@ *y)))=x. 126 [para_into,84.1.1.2.2.2,70.1.1,demod,35,55] -> x* (alpha@ *beta)=x. 143 [para_into,126.1.1,26.1.1] -> beta=alpha. 145 [binary,143.1,1.1] -> . ------------ end of proof -------------