Pith Number

pith:DSU3XORZ

pith:2012:DSU3XORZV3NKGLC67VYURNJNO5

not attested not anchored not stored refs pending

3-Colourability of Dually Chordal Graphs in Linear Time

Arne Leitert

arxiv:1206.0233 v3 · 2012-06-01 · 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{DSU3XORZV3NKGLC67VYURNJNO5}

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	2026-05-18T03:41:01.089056Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1ca9bbba39aedaa32c5efd7148b52d776bc9009ef1a92d6823ef555d93371808

Aliases

arxiv: 1206.0233 · arxiv_version: 1206.0233v3 · doi: 10.48550/arxiv.1206.0233 · pith_short_12: DSU3XORZV3NK · pith_short_16: DSU3XORZV3NKGLC6 · pith_short_8: DSU3XORZ

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/DSU3XORZV3NKGLC67VYURNJNO5 \
  | 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: 1ca9bbba39aedaa32c5efd7148b52d776bc9009ef1a92d6823ef555d93371808

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ae8b78c18055a10ab629939bc22feed04b7029d72e43288091d3909d5ece01b4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2012-06-01T16:00:59Z",
    "title_canon_sha256": "9d4a85a01651a9a2e1c8a5098509a0c0412e7ab3c6ed1a2cdab84e0e440fcc9e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1206.0233",
    "kind": "arxiv",
    "version": 3
  }
}