Pith Number

pith:VRF4BVRC

pith:1997:VRF4BVRCPH62UMDUYSTCAOGDX6

not attested not anchored not stored refs pending

Black holes and gravitational waves: simultaneous discovery by initial laser interferometers

K.A.Postnov, M.E.Prokhorov, V.M.Lipunov

arxiv:astro-ph/9701134 v1 · 1997-01-20 · 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{VRF4BVRCPH62UMDUYSTCAOGDX6}

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	2026-05-18T01:07:40.251431Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac4bc0d62279fdaa3074c4a62038c3bf91627a3997d7119f0eae05bdbc1c3414

Aliases

arxiv: astro-ph/9701134 · arxiv_version: astro-ph/9701134v1 · doi: 10.48550/arxiv.astro-ph/9701134 · pith_short_12: VRF4BVRCPH62 · pith_short_16: VRF4BVRCPH62UMDU · pith_short_8: VRF4BVRC

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/VRF4BVRCPH62UMDUYSTCAOGDX6 \
  | 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: ac4bc0d62279fdaa3074c4a62038c3bf91627a3997d7119f0eae05bdbc1c3414

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ea38cbcb81653231ad817760a8726d478eb44762049006501b11031c95ba8582",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-01-20T08:37:34Z",
    "title_canon_sha256": "62a2ae613917878884b5b2154886cecfb2f7d9b9929d8827adbf027e4b264a9f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9701134",
    "kind": "arxiv",
    "version": 1
  }
}