Pith Number

pith:HQCTOHGQ

pith:2010:HQCTOHGQMCU2DAYBDOA4KKCMOM

not attested not anchored not stored refs pending

The capture time of grids

Abbas Mehrabian

arxiv:1008.4424 v2 · 2010-08-26 · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HQCTOHGQMCU2DAYBDOA4KKCMOM}

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	2026-05-18T04:37:32.891912Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3c05371cd060a9a183011b81c5284c733c48f071819d8b77c2ec38670ed3b56f

Aliases

arxiv: 1008.4424 · arxiv_version: 1008.4424v2 · doi: 10.48550/arxiv.1008.4424 · pith_short_12: HQCTOHGQMCU2 · pith_short_16: HQCTOHGQMCU2DAYB · pith_short_8: HQCTOHGQ

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/HQCTOHGQMCU2DAYBDOA4KKCMOM \
  | 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: 3c05371cd060a9a183011b81c5284c733c48f071819d8b77c2ec38670ed3b56f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "71f3739af27689fd18c5b56a9f9a5418414d806ad9fbbee86e53561b03693974",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2010-08-26T03:30:28Z",
    "title_canon_sha256": "d78562f5c15cb8978222c26c75653ea991a84d08b90a12f7cbd49a051410bdf7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1008.4424",
    "kind": "arxiv",
    "version": 2
  }
}