| Step | 
						Hyp | 
						Ref | 
						Expression | 
					
						
							| 1 | 
							
								
							 | 
							fuco22natlem1.x | 
							   | 
						
						
							| 2 | 
							
								
							 | 
							fuco22natlem1.y | 
							   | 
						
						
							| 3 | 
							
								
							 | 
							fuco22natlem1.a | 
							   | 
						
						
							| 4 | 
							
								
							 | 
							fuco22natlem1.h | 
							   | 
						
						
							| 5 | 
							
								
							 | 
							fuco22natlem2.b | 
							   | 
						
						
							| 6 | 
							
								
							 | 
							eqid | 
							   | 
						
						
							| 7 | 
							
								
							 | 
							eqid | 
							   | 
						
						
							| 8 | 
							
								
							 | 
							eqid | 
							   | 
						
						
							| 9 | 
							
								
							 | 
							eqid | 
							   | 
						
						
							| 10 | 
							
								9 5
							 | 
							natrcl2 | 
							   | 
						
						
							| 11 | 
							
								10
							 | 
							funcrcl3 | 
							   | 
						
						
							| 12 | 
							
								
							 | 
							eqid | 
							   | 
						
						
							| 13 | 
							
								12 6 10
							 | 
							funcf1 | 
							   | 
						
						
							| 14 | 
							
								
							 | 
							eqid | 
							   | 
						
						
							| 15 | 
							
								
							 | 
							eqid | 
							   | 
						
						
							| 16 | 
							
								15 3
							 | 
							natrcl2 | 
							   | 
						
						
							| 17 | 
							
								14 12 16
							 | 
							funcf1 | 
							   | 
						
						
							| 18 | 
							
								17 1
							 | 
							ffvelcdmd | 
							   | 
						
						
							| 19 | 
							
								13 18
							 | 
							ffvelcdmd | 
							   | 
						
						
							| 20 | 
							
								17 2
							 | 
							ffvelcdmd | 
							   | 
						
						
							| 21 | 
							
								13 20
							 | 
							ffvelcdmd | 
							   | 
						
						
							| 22 | 
							
								15 3
							 | 
							natrcl3 | 
							   | 
						
						
							| 23 | 
							
								14 12 22
							 | 
							funcf1 | 
							   | 
						
						
							| 24 | 
							
								23 2
							 | 
							ffvelcdmd | 
							   | 
						
						
							| 25 | 
							
								13 24
							 | 
							ffvelcdmd | 
							   | 
						
						
							| 26 | 
							
								
							 | 
							eqid | 
							   | 
						
						
							| 27 | 
							
								12 26 7 10 18 20
							 | 
							funcf2 | 
							   | 
						
						
							| 28 | 
							
								
							 | 
							eqid | 
							   | 
						
						
							| 29 | 
							
								14 28 26 16 1 2
							 | 
							funcf2 | 
							   | 
						
						
							| 30 | 
							
								29 4
							 | 
							ffvelcdmd | 
							   | 
						
						
							| 31 | 
							
								27 30
							 | 
							ffvelcdmd | 
							   | 
						
						
							| 32 | 
							
								12 26 7 10 20 24
							 | 
							funcf2 | 
							   | 
						
						
							| 33 | 
							
								15 3 14 26 2
							 | 
							natcl | 
							   | 
						
						
							| 34 | 
							
								32 33
							 | 
							ffvelcdmd | 
							   | 
						
						
							| 35 | 
							
								9 5
							 | 
							natrcl3 | 
							   | 
						
						
							| 36 | 
							
								12 6 35
							 | 
							funcf1 | 
							   | 
						
						
							| 37 | 
							
								36 24
							 | 
							ffvelcdmd | 
							   | 
						
						
							| 38 | 
							
								9 5 12 7 24
							 | 
							natcl | 
							   | 
						
						
							| 39 | 
							
								6 7 8 11 19 21 25 31 34 37 38
							 | 
							catass | 
							   | 
						
						
							| 40 | 
							
								1 2 3 4 10
							 | 
							fuco22natlem1 | 
							   | 
						
						
							| 41 | 
							
								40
							 | 
							oveq2d | 
							   | 
						
						
							| 42 | 
							
								23 1
							 | 
							ffvelcdmd | 
							   | 
						
						
							| 43 | 
							
								14 28 26 22 1 2
							 | 
							funcf2 | 
							   | 
						
						
							| 44 | 
							
								43 4
							 | 
							ffvelcdmd | 
							   | 
						
						
							| 45 | 
							
								9 5 12 26 8 42 24 44
							 | 
							nati | 
							   | 
						
						
							| 46 | 
							
								45
							 | 
							oveq1d | 
							   | 
						
						
							| 47 | 
							
								13 42
							 | 
							ffvelcdmd | 
							   | 
						
						
							| 48 | 
							
								12 26 7 10 18 42
							 | 
							funcf2 | 
							   | 
						
						
							| 49 | 
							
								15 3 14 26 1
							 | 
							natcl | 
							   | 
						
						
							| 50 | 
							
								48 49
							 | 
							ffvelcdmd | 
							   | 
						
						
							| 51 | 
							
								12 26 7 10 42 24
							 | 
							funcf2 | 
							   | 
						
						
							| 52 | 
							
								51 44
							 | 
							ffvelcdmd | 
							   | 
						
						
							| 53 | 
							
								6 7 8 11 19 47 25 50 52 37 38
							 | 
							catass | 
							   | 
						
						
							| 54 | 
							
								36 42
							 | 
							ffvelcdmd | 
							   | 
						
						
							| 55 | 
							
								9 5 12 7 42
							 | 
							natcl | 
							   | 
						
						
							| 56 | 
							
								12 26 7 35 42 24
							 | 
							funcf2 | 
							   | 
						
						
							| 57 | 
							
								56 44
							 | 
							ffvelcdmd | 
							   | 
						
						
							| 58 | 
							
								6 7 8 11 19 47 54 50 55 37 57
							 | 
							catass | 
							   | 
						
						
							| 59 | 
							
								46 53 58
							 | 
							3eqtr3d | 
							   | 
						
						
							| 60 | 
							
								39 41 59
							 | 
							3eqtrd | 
							   |