| Step | Hyp | Ref | Expression | 
						
							| 1 |  | lcdsca.h |  | 
						
							| 2 |  | lcdsca.u |  | 
						
							| 3 |  | lcdsca.f |  | 
						
							| 4 |  | lcdsca.o |  | 
						
							| 5 |  | lcdsca.c |  | 
						
							| 6 |  | lcdsca.r |  | 
						
							| 7 |  | lcdsca.k |  | 
						
							| 8 |  | eqid |  | 
						
							| 9 |  | eqid |  | 
						
							| 10 |  | eqid |  | 
						
							| 11 |  | eqid |  | 
						
							| 12 | 1 8 5 2 9 10 11 7 | lcdval |  | 
						
							| 13 | 12 | fveq2d |  | 
						
							| 14 |  | fvex |  | 
						
							| 15 | 14 | rabex |  | 
						
							| 16 |  | eqid |  | 
						
							| 17 |  | eqid |  | 
						
							| 18 | 16 17 | resssca |  | 
						
							| 19 | 15 18 | ax-mp |  | 
						
							| 20 | 13 19 | eqtr4di |  | 
						
							| 21 | 1 2 7 | dvhlmod |  | 
						
							| 22 | 3 4 11 17 21 | ldualsca |  | 
						
							| 23 | 20 22 | eqtrd |  | 
						
							| 24 | 6 23 | eqtrid |  |