Pith Number

pith:F43OQIVO

pith:2023:F43OQIVONCSCYZOBOB6XPC3IXC

not attested not anchored not stored refs pending

Redicolouring digraphs: directed treewidth and cycle-degeneracy

Ignasi Sau, Lucas Picasarri-Arrieta, Nicolas Nisse

arxiv:2307.06700 v2 · 2023-07-13 · math.CO · cs.DM

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{F43OQIVONCSCYZOBOB6XPC3IXC}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-05T08:16:21.348191Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2f36e822ae68a42c65c1707d778b68b89897bfb30e73cc1c99167cfa34a228b4

Aliases

arxiv: 2307.06700 · arxiv_version: 2307.06700v2 · doi: 10.48550/arxiv.2307.06700 · pith_short_12: F43OQIVONCSC · pith_short_16: F43OQIVONCSCYZOB · pith_short_8: F43OQIVO

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/F43OQIVONCSCYZOBOB6XPC3IXC \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 2f36e822ae68a42c65c1707d778b68b89897bfb30e73cc1c99167cfa34a228b4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ba6b21e524bea680d922c68a18f3a459477e8cc5cedfbd4d124ef28717d3d383",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2023-07-13T11:56:05Z",
    "title_canon_sha256": "22054f7c8b38ab9f1be857e5be92b1790fab2167b5145f6660444fdb1ff47937"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2307.06700",
    "kind": "arxiv",
    "version": 2
  }
}