Source-pinned research

Research proof index

Search theorem names, mathematical ideas, modules, topics, projects, and role-labelled researchers. Open a result for its complete indexed Lean declaration and source record.

This index contains 423 research declarations. Search 10,000 more complete Mathlib declarations.

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Project-declaredLean 4.31.0

Mem subdomain of le of mem subdomain

Domain.CosetFftDomainClass.mem_subdomain_of_le_of_mem_subdomain

Plain-language statement

If j ≤ i, then we do not have x ∈ subdomain ω i → x ∈ subdomain ω j in the general case but rescaling x as ω 0 ^ 2 ^ j * (ω 0)⁻¹ ^ 2 ^ i * x gives us a member of subdomain ω j.

cryptographyproof systemscoding theory

Source project: ArkLib

Person-level attribution pending.

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Project-declaredLean 4.31.0

Mul mem of mem to Fft Domain of mem

Domain.CosetFftDomainClass.mul_mem_of_mem_toFftDomain_of_mem

Plain-language statement

Multiplying an element of the normalized FFT domain by an element of the original coset domain gives another element of the original coset domain.

cryptographyproof systemscoding theory

Source project: ArkLib

Person-level attribution pending.

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Project-declaredLean 4.31.0

Pow mem of mem

Domain.CosetFftDomainClass.pow_mem_of_mem

Plain-language statement

If x lies in the jth subdomain, then x ^ 2 ^ i lies in the (j + i)th subdomain, provided j + i ≤ n.

cryptographyproof systemscoding theory

Source project: ArkLib

Person-level attribution pending.

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Project-declaredLean 4.31.0

Square roots explicit

Domain.CosetFftDomainClass.square_roots_explicit

Plain-language statement

The square roots of x inside the ith subdomain are exactly y and -y, for any square root y of x.

cryptographyproof systemscoding theory

Source project: ArkLib

Person-level attribution pending.

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Project-declaredLean 4.31.0

Subdomain to Fft Domain comm

Domain.CosetFftDomainClass.subdomain_toFftDomain_comm

Plain-language statement

Normalizing the ith coset subdomain agrees with taking the ith FFT subdomain of the normalized domain.

cryptographyproof systemscoding theory

Source project: ArkLib

Person-level attribution pending.

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Project-declaredLean 4.31.0

To Coset Fft Domain of Coset Fft Domain

Domain.CosetFftDomainClass.toCosetFftDomain_of_CosetFftDomain

Plain-language statement

Reconstructing a concrete coset FFT domain from its class instance gives back the original domain.

cryptographyproof systemscoding theory

Source project: ArkLib

Person-level attribution pending.

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