Pith Number

pith:Q3U2MHXD

pith:2019:Q3U2MHXDYEF57XWT3SG6AA72XG

not attested not anchored not stored refs pending

Evaluating the classification of Fermi BCUs from the 4FGL Catalog Using Machine Learning

Enze Li, Jun-Hui Fan, Kerui Zhu, Qingwen Wu, Shi-Ju Kang, Wujing Ou, Yue Yin

arxiv:1911.02570 v1 · 2019-11-06 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q3U2MHXDYEF57XWT3SG6AA72XG}

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	2026-07-05T00:31:30.486891Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

86e9a61ee3c10bdfded3dc8de003fab9bc8c8d90ab4d262e38d784487220510a

Aliases

arxiv: 1911.02570 · arxiv_version: 1911.02570v1 · doi: 10.48550/arxiv.1911.02570 · pith_short_12: Q3U2MHXDYEF5 · pith_short_16: Q3U2MHXDYEF57XWT · pith_short_8: Q3U2MHXD

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/Q3U2MHXDYEF57XWT3SG6AA72XG \
  | 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: 86e9a61ee3c10bdfded3dc8de003fab9bc8c8d90ab4d262e38d784487220510a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e2d2472df03a43d1ff655d289d8125d7495d09f9be07367f0615030a63a5ab84",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-11-06T19:00:00Z",
    "title_canon_sha256": "5eb3b01e448318eb98a2c941e1b955e548e34bee6b089953e18bbacb8ad2be27"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1911.02570",
    "kind": "arxiv",
    "version": 1
  }
}