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 44 research declarations. Search 10,000 more complete Mathlib declarations.

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Project-declaredLean 4.31.0

Johnson d le n

JohnsonBound.johnson_d_le_n

Plain-language statement

The average pairwise distance d(B) is at most n.

cryptographyproof systemscoding theory

Source project: ArkLib

Person-level attribution pending.

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Project-declaredLean 4.31.0

Johnson den lb e pos

JohnsonBound.johnson_den_lb_e_pos

Plain-language statement

Lower bound on the Johnson denominator when e > 0.

cryptographyproof systemscoding theory

Source project: ArkLib

Person-level attribution pending.

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Project-declaredLean 4.31.0

Johnson denom

JohnsonBound.johnson_denom

Plain-language statement

Algebraic identity expressing the Johnson LHS as a difference of squares.

cryptographyproof systemscoding theory

Source project: ArkLib

Person-level attribution pending.

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Project-declaredLean 4.31.0

Johnson e div ne J

JohnsonBound.johnson_e_div_ne_J

Plain-language statement

The ratio e/n cannot equal J'(q, d/n) under the Johnson hypothesis.

cryptographyproof systemscoding theory

Source project: ArkLib

Person-level attribution pending.

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Project-declaredLean 4.31.0

Johnson gap frac d gt one

JohnsonBound.johnson_gap_frac_d_gt_one

Plain-language statement

When q · d / ((q-1) · n) > 1, there is a positive gap of size ≥ 1/((q-1)·n).

cryptographyproof systemscoding theory

Source project: ArkLib

Person-level attribution pending.

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Project-declaredLean 4.31.0

Johnson unrefined

JohnsonBound.johnson_unrefined

Plain-language statement

Unrefined Johnson bound in terms of e, d, and |B|.

cryptographyproof systemscoding theory

Source project: ArkLib

Person-level attribution pending.

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