Pith Number

pith:DEUG2NUM

pith:2016:DEUG2NUMHDIGAEUU5UPLSNV3XZ

not attested not anchored not stored refs pending

Contradictions and narrowness of views in "The fables of Ishango, or the irresistible temptation of mathematical fiction", answers and updates (in English and in French)

Dirk Huylebrouck, Vladimir Pletser

arxiv:1607.00860 v2 · 2016-06-28 · math.HO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DEUG2NUMHDIGAEUU5UPLSNV3XZ}

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	2026-05-18T01:02:49.743088Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

19286d368c38d0601294ed1eb936bbbe46c1e6bda0521e5b31ff14644e7b3510

Aliases

arxiv: 1607.00860 · arxiv_version: 1607.00860v2 · doi: 10.48550/arxiv.1607.00860 · pith_short_12: DEUG2NUMHDIG · pith_short_16: DEUG2NUMHDIGAEUU · pith_short_8: DEUG2NUM

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/DEUG2NUMHDIGAEUU5UPLSNV3XZ \
  | 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: 19286d368c38d0601294ed1eb936bbbe46c1e6bda0521e5b31ff14644e7b3510

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5b9c2c09dfef2d95223f9e39c745b188a817322efb2447a08ba2ba52206b3b8f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2016-06-28T22:37:29Z",
    "title_canon_sha256": "235476fa0192115750ecfd7de2e3ec2516873038920da61430f0bd6fa0bf0300"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1607.00860",
    "kind": "arxiv",
    "version": 2
  }
}