Pith Number

pith:RTWBZR4I

pith:2019:RTWBZR4IPDMKBID3E6QMNVHCYG

not attested not anchored not stored refs pending

Evaluating the optical classification of Fermi BCUs using machine learning

Jianchao Feng, Junhui Fan, Qingwen Wu, Shi-Ju Kang, Weiming Mao, Yue Yin

arxiv:1902.07717 v1 · 2019-02-20 · 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{RTWBZR4IPDMKBID3E6QMNVHCYG}

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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	2026-05-17T23:52:01.096973Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8cec1cc78878d8a0a07b27a0c6d4e2c1b13e041ce47c6ec4eef09781617eaf73

Aliases

arxiv: 1902.07717 · arxiv_version: 1902.07717v1 · doi: 10.48550/arxiv.1902.07717 · pith_short_12: RTWBZR4IPDMK · pith_short_16: RTWBZR4IPDMKBID3 · pith_short_8: RTWBZR4I

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/RTWBZR4IPDMKBID3E6QMNVHCYG \
  | 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: 8cec1cc78878d8a0a07b27a0c6d4e2c1b13e041ce47c6ec4eef09781617eaf73

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c73c41e3861fc593d14d5ee130b7974d97a51c1b0d5817ecfd0f1e0b57d8dbe2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-02-20T19:00:00Z",
    "title_canon_sha256": "2cb52c697f95d59010aa264f6e639d5b51c8fc214846b2c808eb183f7d34ef3c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.07717",
    "kind": "arxiv",
    "version": 1
  }
}