Pith Number

pith:NIWW3LK2

pith:2014:NIWW3LK2ZSDW3EICMN5L23L6Q4

not attested not anchored not stored refs pending

On Helly's theorem in geodesic spaces

Sergei Ivanov

arxiv:1401.6654 v3 · 2014-01-26 · math.MG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NIWW3LK2ZSDW3EICMN5L23L6Q4}

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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	2026-05-18T02:51:41.642753Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6a2d6dad5acc876d9102637abd6d7e8719d9cab0d02ba71c7bc29762c3e11374

Aliases

arxiv: 1401.6654 · arxiv_version: 1401.6654v3 · doi: 10.48550/arxiv.1401.6654 · pith_short_12: NIWW3LK2ZSDW · pith_short_16: NIWW3LK2ZSDW3EIC · pith_short_8: NIWW3LK2

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/NIWW3LK2ZSDW3EICMN5L23L6Q4 \
  | 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: 6a2d6dad5acc876d9102637abd6d7e8719d9cab0d02ba71c7bc29762c3e11374

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2a9a85d14ae23c116a7d18ab8b88a9f38621193cd5cc3e828eca7ef4a3fb656f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.MG",
    "submitted_at": "2014-01-26T14:33:03Z",
    "title_canon_sha256": "cf48d59409a767eed5d345c1ac9bf733b823898a28a65aca7bcf1664c5270741"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.6654",
    "kind": "arxiv",
    "version": 3
  }
}