| Step | Hyp | Ref | Expression | 
						
							| 1 |  | dochdmm1.h |  | 
						
							| 2 |  | dochdmm1.i |  | 
						
							| 3 |  | dochdmm1.u |  | 
						
							| 4 |  | dochdmm1.v |  | 
						
							| 5 |  | dochdmm1.o |  | 
						
							| 6 |  | dochdmm1.j |  | 
						
							| 7 |  | dochdmm1.k |  | 
						
							| 8 |  | dochdmm1.x |  | 
						
							| 9 |  | dochdmm1.y |  | 
						
							| 10 | 1 3 2 4 | dihrnss |  | 
						
							| 11 | 7 8 10 | syl2anc |  | 
						
							| 12 | 1 3 4 5 | dochssv |  | 
						
							| 13 | 7 11 12 | syl2anc |  | 
						
							| 14 | 1 3 2 4 | dihrnss |  | 
						
							| 15 | 7 9 14 | syl2anc |  | 
						
							| 16 | 1 3 4 5 | dochssv |  | 
						
							| 17 | 7 15 16 | syl2anc |  | 
						
							| 18 | 1 3 4 5 | dochdmj1 |  | 
						
							| 19 | 7 13 17 18 | syl3anc |  | 
						
							| 20 | 1 2 5 | dochoc |  | 
						
							| 21 | 7 8 20 | syl2anc |  | 
						
							| 22 | 1 2 5 | dochoc |  | 
						
							| 23 | 7 9 22 | syl2anc |  | 
						
							| 24 | 21 23 | ineq12d |  | 
						
							| 25 | 19 24 | eqtr2d |  | 
						
							| 26 | 25 | fveq2d |  | 
						
							| 27 | 1 3 4 5 6 | djhval2 |  | 
						
							| 28 | 7 13 17 27 | syl3anc |  | 
						
							| 29 | 26 28 | eqtr4d |  |