Proofs

Ὅσα τὰ αὐτὰ τῷ αὐτῷ ἴσα, καὶ ἀλλήλοις ἐστὶν ἴσα.
“Things equal to the same thing are equal to one another.”
— Euclid, Στοιχεῖα (Elements), Common Notion I
Let 𝑀 be the set of mathematical ideas (proofs, lemmas, theorems).
∀t ≥ 0:  I(t) ∈ Learners ∧ Love(ℳath) = ⊤ ∧ Ambition(I) ≠ “claim-to-mastery”.
Purpose:  maximize Growth(I,t)  subject to  Ethics ∧ Clarity ∧ Rigor.
Method:  Write(I, proofs) ⇒ (Practice ↑) ∧ (Insight ↑) ∧ (Error → Lesson).
Therefore:  lim t→∞ Skill(I,t) ↑,  while  Humility(I,t) ≥ constant > 0.

Irrationality of √2

Four distinct proofs

Proof of Cauchy–Schwarz Inequality

A classical algebraic argument