14 lines
449 B
Lean4
14 lines
449 B
Lean4
import Game.MyNat.Addition
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/-
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This file adds proofs of results which were used in Tutorial World but
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which we can't import (because tutorial world imports multiplication
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in the first level, and we don't want to import this too early)
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-/
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namespace MyNat
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theorem one_eq_succ_zero : 1 = succ 0 := by rfl
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theorem two_eq_succ_one : 2 = succ 1 := by rfl
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theorem three_eq_succ_two : 3 = succ 2 := by rfl
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theorem four_eq_succ_three : 4 = succ 3 := by rfl
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