Source-pinned research

Research proof index

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Project-declaredLean 4.31.0

Folding polynomial is unique

Polynomial.FoldingPolynomial.folding_polynomial_is_unique'

Project documentation

Alternative uniqueness theorem for the folding polynomial. The only difference is the h_x condition which in this theorem is only and inequality. Handy in practice since degreeX is defined as a supremum so inequality is much easier to prove for it.

cryptographyproof systemscoding theory

Source project: ArkLib

Person-level attribution pending.

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Project-declaredLean 4.31.0

Poly Fold base

Polynomial.FoldingPolynomial.polyFold_base

Plain-language statement

Base case of polyFold: when k = 0 or f has degree below k, polyFold f k r = C (f.eval r).

cryptographyproof systemscoding theory

Source project: ArkLib

Person-level attribution pending.

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Project-declaredLean 4.31.0

Poly Fold nat Degree le

Polynomial.FoldingPolynomial.polyFold_natDegree_le

Plain-language statement

The degree bound of polyFold in terms of the degree of the original polynomial and k.

cryptographyproof systemscoding theory

Source project: ArkLib

Person-level attribution pending.

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Project-declaredLean 4.31.0

Poly Fold step

Polynomial.FoldingPolynomial.polyFold_step

Plain-language statement

Recursive case of polyFold: when 0 < k ≤ f.natDegree, polyFold f k r = C ((f %ₘ X^k).eval r) + X * polyFold (f /ₘ X^k) k r.

cryptographyproof systemscoding theory

Source project: ArkLib

Person-level attribution pending.

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