| Step | Hyp | Ref | Expression | 
						
							| 1 |  | lngndx |  | 
						
							| 2 |  | 1re |  | 
						
							| 3 |  | 1nn |  | 
						
							| 4 |  | 7nn0 |  | 
						
							| 5 |  | 1nn0 |  | 
						
							| 6 |  | 1lt10 |  | 
						
							| 7 | 3 4 5 6 | declti |  | 
						
							| 8 | 2 7 | gtneii |  | 
						
							| 9 |  | basendx |  | 
						
							| 10 | 8 9 | neeqtrri |  | 
						
							| 11 | 1 10 | eqnetri |  | 
						
							| 12 |  | 2re |  | 
						
							| 13 |  | 2nn0 |  | 
						
							| 14 |  | 2lt10 |  | 
						
							| 15 | 3 4 13 14 | declti |  | 
						
							| 16 | 12 15 | gtneii |  | 
						
							| 17 |  | plusgndx |  | 
						
							| 18 | 16 17 | neeqtrri |  | 
						
							| 19 | 1 18 | eqnetri |  | 
						
							| 20 | 11 19 | pm3.2i |  | 
						
							| 21 |  | 6re |  | 
						
							| 22 |  | 6nn0 |  | 
						
							| 23 |  | 6lt10 |  | 
						
							| 24 | 3 4 22 23 | declti |  | 
						
							| 25 | 21 24 | gtneii |  | 
						
							| 26 |  | vscandx |  | 
						
							| 27 | 25 26 | neeqtrri |  | 
						
							| 28 | 1 27 | eqnetri |  | 
						
							| 29 |  | 2nn |  | 
						
							| 30 | 5 29 | decnncl |  | 
						
							| 31 | 30 | nnrei |  | 
						
							| 32 |  | 7nn |  | 
						
							| 33 |  | 2lt7 |  | 
						
							| 34 | 5 13 32 33 | declt |  | 
						
							| 35 | 31 34 | gtneii |  | 
						
							| 36 |  | dsndx |  | 
						
							| 37 | 35 36 | neeqtrri |  | 
						
							| 38 | 1 37 | eqnetri |  | 
						
							| 39 | 28 38 | pm3.2i |  | 
						
							| 40 | 20 39 | pm3.2i |  |