phc/lean4game - lean4game - Gitea - PHC

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-												levels

											
										
										
											2 years ago
+								import TestGame.Metadata
 								import Mathlib
 								Game "TestGame"
 								World "Function"
 								Level 5
 								Title ""
 								Introduction
 								"
 								"
 								open Set Function
 								def f3 : ℕ → ℕ := fun n ↦ if Even n then n^2 else n+1
 								#eval (f3 + f3) 2
 								example : ¬ f3.Injective := by
 								  unfold Injective
 								  push_neg
 								  use 2
 								  use 3
 								  simp