Pith Number

pith:D2ZMN7J2

pith:2019:D2ZMN7J2DIZA4BIVBH2EFMHKDA

not attested not anchored not stored refs pending

Counting Answers to Existential Questions

Holger Dell, Marc Roth, Philip Wellnitz

arxiv:1902.04960 v2 · 2019-02-13 · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{D2ZMN7J2DIZA4BIVBH2EFMHKDA}

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	2026-05-17T23:47:35.761307Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1eb2c6fd3a1a320e051509f442b0ea1824a7fc09a333fa70ed4fce8d1cb060f0

Aliases

arxiv: 1902.04960 · arxiv_version: 1902.04960v2 · doi: 10.48550/arxiv.1902.04960 · pith_short_12: D2ZMN7J2DIZA · pith_short_16: D2ZMN7J2DIZA4BIV · pith_short_8: D2ZMN7J2

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/D2ZMN7J2DIZA4BIVBH2EFMHKDA \
  | 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: 1eb2c6fd3a1a320e051509f442b0ea1824a7fc09a333fa70ed4fce8d1cb060f0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "50fd80beb9d3d47b7b08cb20a3c44e80e735da46ff1cccce124447f6f82a3745",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2019-02-13T15:47:33Z",
    "title_canon_sha256": "ff64ec2f0af793fb393bad8bda08db7175b125c0ce4b7d45e6c50892a5d75f4d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.04960",
    "kind": "arxiv",
    "version": 2
  }
}