Pith Number

pith:NDLTWC7H

pith:2011:NDLTWC7HGVBD5XQKCNAW7SJLNK

not attested not anchored not stored refs pending

Two-Color Babylon

Agelos Georgakopoulos, Peter Winkler

arxiv:1111.4189 v1 · 2011-11-17 · math.CO · cs.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NDLTWC7HGVBD5XQKCNAW7SJLNK}

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	2026-05-18T04:08:05.529246Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68d73b0be735423ede0a13416fc92b6a8a89b274b45a26c530c77fe54aeb48de

Aliases

arxiv: 1111.4189 · arxiv_version: 1111.4189v1 · doi: 10.48550/arxiv.1111.4189 · pith_short_12: NDLTWC7HGVBD · pith_short_16: NDLTWC7HGVBD5XQK · pith_short_8: NDLTWC7H

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/NDLTWC7HGVBD5XQKCNAW7SJLNK \
  | 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: 68d73b0be735423ede0a13416fc92b6a8a89b274b45a26c530c77fe54aeb48de

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1cfdfd166ab31506faaa3702da271cf51f288a9cd88f869c634009667cd751fc",
    "cross_cats_sorted": [
      "cs.GT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2011-11-17T19:28:35Z",
    "title_canon_sha256": "13f815d8e7e93520cb57d9c3ac5cc80254a1a9b353d9e21166f0f945d5805737"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1111.4189",
    "kind": "arxiv",
    "version": 1
  }
}