Pith Number

pith:OQNMQ4WM

pith:2019:OQNMQ4WMW3LFPYN3AJYOLLCUJY

not attested not anchored not stored refs pending

Sharing a pizza: bisecting masses with two cuts

Alexander Pilz, Luis Barba, Patrick Schnider

arxiv:1904.02502 v1 · 2019-04-04 · 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{OQNMQ4WMW3LFPYN3AJYOLLCUJY}

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	2026-05-17T23:49:23.460880Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

741ac872ccb6d657e1bb0270e5ac544e3fea0e965012d6daceb0761e46d899ff

Aliases

arxiv: 1904.02502 · arxiv_version: 1904.02502v1 · doi: 10.48550/arxiv.1904.02502 · pith_short_12: OQNMQ4WMW3LF · pith_short_16: OQNMQ4WMW3LFPYN3 · pith_short_8: OQNMQ4WM

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/OQNMQ4WMW3LFPYN3AJYOLLCUJY \
  | 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: 741ac872ccb6d657e1bb0270e5ac544e3fea0e965012d6daceb0761e46d899ff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cd794ebeab17190a9df0611970c8155ddd61cb520e8668869ca3257e40006afb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2019-04-04T11:59:00Z",
    "title_canon_sha256": "2d7b6bad06978596289d63124bacd013f07b3ce36a7af032545c6af01aff044d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.02502",
    "kind": "arxiv",
    "version": 1
  }
}