Pith Number

pith:BZUMW2W2

pith:2002:BZUMW2W2IFWCKVGF2MGXGW7PHS

not attested not anchored not stored refs pending

No observational proof of the black-hole event-horizon

Jean-Pierre Lasota, Marek A. Abramowicz, Wlodek Kluzniak

arxiv:astro-ph/0207270 v1 · 2002-07-12 · 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{BZUMW2W2IFWCKVGF2MGXGW7PHS}

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

2 papers in Pith

Analytic thin disks and rings in a class of nonasymptotically flat static spacetimes

Testing the nature of dark compact objects: a status report

Receipt and verification

First computed	2026-07-04T16:30:21.999198Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0e68cb6ada416c2554c5d30d735bef3c9c240d16d8f4e1c1dba036d70598eebf

Aliases

arxiv: astro-ph/0207270 · arxiv_version: astro-ph/0207270v1 · doi: 10.48550/arxiv.astro-ph/0207270 · pith_short_12: BZUMW2W2IFWC · pith_short_16: BZUMW2W2IFWCKVGF · pith_short_8: BZUMW2W2

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/BZUMW2W2IFWCKVGF2MGXGW7PHS \
  | 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: 0e68cb6ada416c2554c5d30d735bef3c9c240d16d8f4e1c1dba036d70598eebf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "65671dd5b76b6b447ee324a5a159998c69eb4a07317d6c04ab805240b3ed1503",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-07-12T10:05:34Z",
    "title_canon_sha256": "7f190c66a91572f298904cb98e910b009d6d2c7d8ee44d697b1ebb9de7ee0914"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0207270",
    "kind": "arxiv",
    "version": 1
  }
}