theorem Th37:
(
<*2,1,3*> * <*1,3,2*> = <*2,3,1*> &
<*1,3,2*> * <*2,1,3*> = <*3,1,2*> &
<*2,1,3*> * <*3,2,1*> = <*3,1,2*> &
<*3,2,1*> * <*2,1,3*> = <*2,3,1*> &
<*3,2,1*> * <*3,2,1*> = <*1,2,3*> &
<*2,1,3*> * <*2,1,3*> = <*1,2,3*> &
<*1,3,2*> * <*1,3,2*> = <*1,2,3*> &
<*1,3,2*> * <*2,3,1*> = <*3,2,1*> &
<*2,3,1*> * <*2,3,1*> = <*3,1,2*> &
<*2,3,1*> * <*3,1,2*> = <*1,2,3*> &
<*3,1,2*> * <*2,3,1*> = <*1,2,3*> &
<*3,1,2*> * <*3,1,2*> = <*2,3,1*> &
<*1,3,2*> * <*3,2,1*> = <*2,3,1*> &
<*3,2,1*> * <*1,3,2*> = <*3,1,2*> )