Algebraic Closure and Composite Chord Symmetry of the Regular Nonagon via Cyclotomic Polynomial Resultants in Lean 4 with Comparator.
mathematics formal-verification comparator computational-algebra formal-mathematics interactive-theorem-proving commutative-algebra mathlib chebyshev-polynomials algebraic-number-theory academic-research polynomial-irreducibility-criteria lean4 proof-by-induction cyclotomic-polynomials eisenstein-criterion integer-pullback-isomorphism regular-nonagon composite-chord-symmetry
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Updated
Sep 14, 2026 - Lean