| Step | Hyp | Ref | Expression | 
						
							| 1 |  | trlset.b |  | 
						
							| 2 |  | trlset.l |  | 
						
							| 3 |  | trlset.j |  | 
						
							| 4 |  | trlset.m |  | 
						
							| 5 |  | trlset.a |  | 
						
							| 6 |  | trlset.h |  | 
						
							| 7 |  | elex |  | 
						
							| 8 |  | fveq2 |  | 
						
							| 9 | 8 6 | eqtr4di |  | 
						
							| 10 |  | fveq2 |  | 
						
							| 11 | 10 | fveq1d |  | 
						
							| 12 |  | fveq2 |  | 
						
							| 13 | 12 1 | eqtr4di |  | 
						
							| 14 |  | fveq2 |  | 
						
							| 15 | 14 5 | eqtr4di |  | 
						
							| 16 |  | fveq2 |  | 
						
							| 17 | 16 2 | eqtr4di |  | 
						
							| 18 | 17 | breqd |  | 
						
							| 19 | 18 | notbid |  | 
						
							| 20 |  | fveq2 |  | 
						
							| 21 | 20 4 | eqtr4di |  | 
						
							| 22 |  | fveq2 |  | 
						
							| 23 | 22 3 | eqtr4di |  | 
						
							| 24 | 23 | oveqd |  | 
						
							| 25 |  | eqidd |  | 
						
							| 26 | 21 24 25 | oveq123d |  | 
						
							| 27 | 26 | eqeq2d |  | 
						
							| 28 | 19 27 | imbi12d |  | 
						
							| 29 | 15 28 | raleqbidv |  | 
						
							| 30 | 13 29 | riotaeqbidv |  | 
						
							| 31 | 11 30 | mpteq12dv |  | 
						
							| 32 | 9 31 | mpteq12dv |  | 
						
							| 33 |  | df-trl |  | 
						
							| 34 | 32 33 6 | mptfvmpt |  | 
						
							| 35 | 7 34 | syl |  |