Pith Number

pith:B47MMXAS

pith:2011:B47MMXAS4SX6CKEJYPNSTJ43AD

not attested not anchored not stored refs pending

The black-and-white coloring problem on distance hereditary graphs and strongly chordal graphs

Feng-Ren Tsai, Sheung-Hung Poon, Ton Kloks, Yue-Li Wang

arxiv:1111.0867 v1 · 2011-11-03 · math.CO · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{B47MMXAS4SX6CKEJYPNSTJ43AD}

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	2026-05-18T04:09:36.080864Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0f3ec65c12e4afe12889c3db29a79b00df09870f935f159c87cc52fb267ed595

Aliases

arxiv: 1111.0867 · arxiv_version: 1111.0867v1 · doi: 10.48550/arxiv.1111.0867 · pith_short_12: B47MMXAS4SX6 · pith_short_16: B47MMXAS4SX6CKEJ · pith_short_8: B47MMXAS

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/B47MMXAS4SX6CKEJYPNSTJ43AD \
  | 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: 0f3ec65c12e4afe12889c3db29a79b00df09870f935f159c87cc52fb267ed595

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "00fbd5bf237761bbff0cf1e3b138443ab31255e0f02817ab000d986a71464c5d",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2011-11-03T15:01:07Z",
    "title_canon_sha256": "86f52e3d4277fd877bf77f4ef8bde8b9f6ad467f39f673297c1498b44bbd2389"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1111.0867",
    "kind": "arxiv",
    "version": 1
  }
}