Pith Number

pith:BIVYYZDE

pith:1992:BIVYYZDE4MGNUPRZZYHVRPCST2

not attested not anchored not stored refs pending

A rotating black hole in the Galactic Center

Heino Falcke, Peter G. Mezger, Peter L. Biermann, Wolfgang J. Duschl

arxiv:astro-ph/9212001 v1 · 1992-12-07 · 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{BIVYYZDE4MGNUPRZZYHVRPCST2}

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	2026-05-18T04:21:41.343224Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0a2b8c6464e30cda3e39ce0f58bc529e82b7ce52ba439d6ac473b56b32a4ac19

Aliases

arxiv: astro-ph/9212001 · arxiv_version: astro-ph/9212001v1 · doi: 10.48550/arxiv.astro-ph/9212001 · pith_short_12: BIVYYZDE4MGN · pith_short_16: BIVYYZDE4MGNUPRZ · pith_short_8: BIVYYZDE

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/BIVYYZDE4MGNUPRZZYHVRPCST2 \
  | 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: 0a2b8c6464e30cda3e39ce0f58bc529e82b7ce52ba439d6ac473b56b32a4ac19

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4e3c42e169c05b32612f73596fef65ede1cab83d98e4d0258cecdacb5a6c869e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1992-12-07T14:59:33Z",
    "title_canon_sha256": "a5c3b2d459f422077555db6464a216e015d51c57bbdb88d44dcb7d4cf81fc927"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9212001",
    "kind": "arxiv",
    "version": 1
  }
}