Pith Number

pith:C7HQHVYX

pith:2014:C7HQHVYXBPYLB3RMZSXE673YR5

not attested not anchored not stored refs pending

Peri-abelian categories and the universal central extension condition

James R. A. Gray, Tim Van der Linden

arxiv:1404.3067 v2 · 2014-04-11 · math.CT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{C7HQHVYXBPYLB3RMZSXE673YR5}

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	2026-05-18T02:26:52.921258Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

17cf03d7170bf0b0ee2cccae4f7f788f6dd1a55b2d760a4b53a998f819d947cc

Aliases

arxiv: 1404.3067 · arxiv_version: 1404.3067v2 · doi: 10.48550/arxiv.1404.3067 · pith_short_12: C7HQHVYXBPYL · pith_short_16: C7HQHVYXBPYLB3RM · pith_short_8: C7HQHVYX

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/C7HQHVYXBPYLB3RMZSXE673YR5 \
  | 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: 17cf03d7170bf0b0ee2cccae4f7f788f6dd1a55b2d760a4b53a998f819d947cc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "01cfb9eacf7fc3c230ae05b8e02c98ba26443f67388d5fbdd85602c7a6fcffbd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CT",
    "submitted_at": "2014-04-11T10:39:58Z",
    "title_canon_sha256": "d86186d480ca47fedbc482a04146a5993d2b41c3e82f783bd1b36ca10c8e7454"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.3067",
    "kind": "arxiv",
    "version": 2
  }
}