Pith Number

pith:SIMCBZBZ

pith:2014:SIMCBZBZ2CMTPKT63AGMQ3WEB2

not attested not anchored not stored refs pending

A Fire Fighter's Problem

(2) University of Lund, Christos Levcopoulos (2) ((1) University of Bonn, Department of Computer Science), Elmar Langetepe (1), Germany, Institute of Computer Science I, Rolf Klein (1), Sweden

arxiv:1412.6065 v2 · 2014-12-02 · cs.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SIMCBZBZ2CMTPKT63AGMQ3WEB2}

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	2026-05-18T01:17:05.541630Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

921820e439d09937aa7ed80cc86ec40ebe934eaff1b594344218918236103e46

Aliases

arxiv: 1412.6065 · arxiv_version: 1412.6065v2 · doi: 10.48550/arxiv.1412.6065 · pith_short_12: SIMCBZBZ2CMT · pith_short_16: SIMCBZBZ2CMTPKT6 · pith_short_8: SIMCBZBZ

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/SIMCBZBZ2CMTPKT63AGMQ3WEB2 \
  | 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: 921820e439d09937aa7ed80cc86ec40ebe934eaff1b594344218918236103e46

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "64945d235f179ef2be8f9783a1d26c2861c97e7691e3d1c2c589780cd99c33d8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2014-12-02T10:46:13Z",
    "title_canon_sha256": "0a5904f08b7322f60e7d016ca499951547bf7308e50d3d4a3b33746377e1768d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1412.6065",
    "kind": "arxiv",
    "version": 2
  }
}