Pith Number

pith:AMSR6PXI

pith:2013:AMSR6PXI4MWLYM5PLS3K7YV6CO

not attested not anchored not stored refs pending

Strong chromatic index of chordless graphs

Manu Basavaraju, Mathew C. Francis

arxiv:1305.2009 v2 · 2013-05-09 · 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{AMSR6PXI4MWLYM5PLS3K7YV6CO}

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	2026-05-18T03:15:43.179777Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

03251f3ee8e32cbc33af5cb6afe2be13b8c792a13169dc7e0095db601fde1b99

Aliases

arxiv: 1305.2009 · arxiv_version: 1305.2009v2 · doi: 10.48550/arxiv.1305.2009 · pith_short_12: AMSR6PXI4MWL · pith_short_16: AMSR6PXI4MWLYM5P · pith_short_8: AMSR6PXI

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/AMSR6PXI4MWLYM5PLS3K7YV6CO \
  | 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: 03251f3ee8e32cbc33af5cb6afe2be13b8c792a13169dc7e0095db601fde1b99

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0e8b2e75cbd0d09133058498fdf0a3b233f88e24e97b74e0ab10f99af9e70287",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-05-09T04:43:48Z",
    "title_canon_sha256": "b7bc6c97518dd1c185986171ccb1f41917f0af7e6d2f8fc56620d3587bbe75e4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.2009",
    "kind": "arxiv",
    "version": 2
  }
}