| Step | Hyp | Ref | Expression | 
						
							| 1 |  | rb-imdf |  | 
						
							| 2 | 1 | rblem7 |  | 
						
							| 3 |  | rb-imdf |  | 
						
							| 4 | 3 | rblem6 |  | 
						
							| 5 |  | rb-ax2 |  | 
						
							| 6 |  | rb-ax4 |  | 
						
							| 7 |  | rb-ax3 |  | 
						
							| 8 | 6 7 | rbsyl |  | 
						
							| 9 |  | rb-ax4 |  | 
						
							| 10 |  | rb-ax3 |  | 
						
							| 11 | 9 10 | rbsyl |  | 
						
							| 12 |  | rb-ax2 |  | 
						
							| 13 | 11 12 | anmp |  | 
						
							| 14 | 8 13 | rblem1 |  | 
						
							| 15 | 5 14 | rbsyl |  | 
						
							| 16 | 4 15 | anmp |  | 
						
							| 17 |  | rb-imdf |  | 
						
							| 18 | 17 | rblem7 |  | 
						
							| 19 | 16 18 | rblem1 |  | 
						
							| 20 |  | rb-ax1 |  | 
						
							| 21 |  | rb-ax2 |  | 
						
							| 22 |  | rb-ax4 |  | 
						
							| 23 |  | rb-ax3 |  | 
						
							| 24 | 22 23 | rbsyl |  | 
						
							| 25 |  | rb-ax4 |  | 
						
							| 26 |  | rb-ax3 |  | 
						
							| 27 | 25 26 | rbsyl |  | 
						
							| 28 | 24 27 11 | rblem4 |  | 
						
							| 29 |  | rb-ax2 |  | 
						
							| 30 | 28 29 | rbsyl |  | 
						
							| 31 | 21 30 | rbsyl |  | 
						
							| 32 | 20 31 | anmp |  | 
						
							| 33 | 19 32 | rbsyl |  | 
						
							| 34 |  | rb-imdf |  | 
						
							| 35 | 34 | rblem6 |  | 
						
							| 36 | 33 35 | rbsyl |  | 
						
							| 37 | 2 36 | rbsyl |  | 
						
							| 38 |  | rb-imdf |  | 
						
							| 39 | 38 | rblem7 |  | 
						
							| 40 | 37 39 | anmp |  |