trureturingGitHub MATHEMATICAL ATLAS

Combinatorics / CONCEPT

Constructing Indecomposable 2413 and 2431 Avoiders

Maximum insertion gives a reversible construction and active-position polynomial recurrences for indecomposable Fishburn permutations avoiding 2413 and 2431.

Closed Authored exposition
DIRECT PREREQUISITES3
DIRECT CONSEQUENCES1
PROOF DEPTH8
DOCUMENT LINKS1
THEOREM

A construction with active-position weights

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Indecomposability after Maximum InsertionIndecomposability after MaximumInsertionActive Positions in Direct Sums Avoiding 2413 and 2431Active Positions in Direct SumsAvoiding 2413 and 2431Active Positions for 2413 and 2431 AvoidersActive Positions for 2413 and2431 AvoidersConstructing Indecomposable 2413 and 2431 AvoidersConstructing Indecomposable2413 and 2431 AvoidersEnumeration of Two Fishburn Avoidance ClassesEnumeration of Two FishburnAvoidance Classes
Proof dependencyStructural affinityDocument link

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Lean sourceResearch workspace
Status
Closed
Depth
8
Layer
D5/S3
Domain
Combinatorics
Node ID
D5/S3/Combinatorics/FishburnTenThirteen/FishburnTenThirteenAConstruction
Repository path
D5/S3/Combinatorics/FishburnTenThirteen/FishburnTenThirteenAConstruction.lean
Truth release
sha256:76a8db6a0f78609b1b9d4a959c8392f2752f2daaddc1930e046e34ce07d0f608
Source commit
b52262a023c4db9bb30a128ebfd80ea4ef4c1a53
Source tree
37a24ddf3b9983bdabf0acbfd9b32b06c35c28d3

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Dependency edges, status, and source coordinates come from the verified release and certified topology. Blueprint exposition is labeled separately. A fallback title carries no additional mathematical authority.