The Blueprint For Lean 4 Project

1.1 SubDemo

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Definition 1.1.1 One
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one is 1.

Definition 1.1.2 Two
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two is 2.

Lemma 1.1.3 One plus one is two
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one + one = two

Proof

It is obvious.

Remark 1.1.4
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Some remarks.

Example 1.1.5 Some examples
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Some examples in detail.