Pith Number

pith:H5O5MDIQ

pith:2016:H5O5MDIQ4HFWFW5EOPUNARRCNM

not attested not anchored not stored refs pending

Universal Guard Problems

Christian Scheffer, Joseph S. B. Mitchell, Qian Li, S\'andor P. Fekete

arxiv:1611.08315 v2 · 2016-11-24 · 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{H5O5MDIQ4HFWFW5EOPUNARRCNM}

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	2026-05-18T00:47:56.624507Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f5dd60d10e1cb62dba473e8d046226b3d1bce577d1e7976f43118cfd180d9ac

Aliases

arxiv: 1611.08315 · arxiv_version: 1611.08315v2 · doi: 10.48550/arxiv.1611.08315 · pith_short_12: H5O5MDIQ4HFW · pith_short_16: H5O5MDIQ4HFWFW5E · pith_short_8: H5O5MDIQ

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/H5O5MDIQ4HFWFW5EOPUNARRCNM \
  | 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: 3f5dd60d10e1cb62dba473e8d046226b3d1bce577d1e7976f43118cfd180d9ac

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fb52da4c86c65928059a7f4b8a0f31a1e3b6fd9005489c9926460c3ab2fb7d80",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2016-11-24T21:38:59Z",
    "title_canon_sha256": "cce3864d0179409734b44761cddbfa85f7a345eac11089b0991cf4299da722a9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1611.08315",
    "kind": "arxiv",
    "version": 2
  }
}