Pith Number

pith:642AO5V5

pith:2013:642AO5V5OYUGXFNBPKOEGTCTIE

not attested not anchored not stored refs pending

Who and What Links to the Internet Archive

Ahmed AlSum, Michael L. Nelson, Michele C. Weigle, Yasmin AlNoamany

arxiv:1309.4016 v1 · 2013-09-16 · cs.DL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{642AO5V5OYUGXFNBPKOEGTCTIE}

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	2026-05-18T03:13:11.485281Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f7340776bd76286b95a17a9c434c534124e34d9a74efd10fff9a2c42820d2899

Aliases

arxiv: 1309.4016 · arxiv_version: 1309.4016v1 · doi: 10.48550/arxiv.1309.4016 · pith_short_12: 642AO5V5OYUG · pith_short_16: 642AO5V5OYUGXFNB · pith_short_8: 642AO5V5

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/642AO5V5OYUGXFNBPKOEGTCTIE \
  | 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: f7340776bd76286b95a17a9c434c534124e34d9a74efd10fff9a2c42820d2899

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "64d21b98c0ca726ea5f2a2c463be6255d0c8c0852a571507bd25bd8313482c9f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DL",
    "submitted_at": "2013-09-16T16:01:37Z",
    "title_canon_sha256": "bf4c6671e674dca51ea0a5100df56c24f538c7ed351452eb79992eb6221776a3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.4016",
    "kind": "arxiv",
    "version": 1
  }
}