Pith Number

pith:BIGZHDFM

pith:1998:BIGZHDFMXFBIMRSSYWF7UAQRMJ

not attested not anchored not stored refs pending

The Stellar Content of Active Galaxies

(2) IF-UFRGS, Brasil), Brazil, Henrique R. Schmitt (2) ((1) UFSC - Florianopolis, Porto Alegre, Roberto Cid Fernandes (1), Thaisa Storchi-Bergmann

arxiv:astro-ph/9801309 v1 · 1998-01-29 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BIGZHDFMXFBIMRSSYWF7UAQRMJ}

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.

Cited by

1 paper in Pith

Why Machine Learning Models Systematically Underestimate Extreme Values

Receipt and verification

First computed	2026-07-04T16:06:07.663000Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0a0d938cacb942864652c58bfa0211627092c08d33ecc0c74545b6b2caadf04b

Aliases

arxiv: astro-ph/9801309 · arxiv_version: astro-ph/9801309v1 · doi: 10.48550/arxiv.astro-ph/9801309 · pith_short_12: BIGZHDFMXFBI · pith_short_16: BIGZHDFMXFBIMRSS · pith_short_8: BIGZHDFM

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/BIGZHDFMXFBIMRSSYWF7UAQRMJ \
  | 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: 0a0d938cacb942864652c58bfa0211627092c08d33ecc0c74545b6b2caadf04b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b36c8a2c8c86b410b47a344c15e38a8288dacd74970bb01e9e88ee7b20da6fa3",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-01-29T22:06:59Z",
    "title_canon_sha256": "07fe9e477a010c92ddb9a7a303130e78b5b24aa491ff2108204ba18ffc355170"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9801309",
    "kind": "arxiv",
    "version": 1
  }
}