Pith Number

pith:4BILFROQ

pith:2016:4BILFROQ34FCY23BULZJHFL7KQ

not attested not anchored not stored refs pending

A Brief History of Gravitational Waves

George F. Smoot, Jorge L. Cervantes-Cota, Salvador Galindo-Uribarri

arxiv:1609.09400 v1 · 2016-09-26 · physics.hist-ph · astro-ph.HE · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4BILFROQ34FCY23BULZJHFL7KQ}

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	2026-05-18T01:03:37.980257Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e050b2c5d0df0a2c6b61a2f293957f543e8e5f76226cb92f75053d73c720355d

Aliases

arxiv: 1609.09400 · arxiv_version: 1609.09400v1 · doi: 10.48550/arxiv.1609.09400 · pith_short_12: 4BILFROQ34FC · pith_short_16: 4BILFROQ34FCY23B · pith_short_8: 4BILFROQ

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/4BILFROQ34FCY23BULZJHFL7KQ \
  | 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: e050b2c5d0df0a2c6b61a2f293957f543e8e5f76226cb92f75053d73c720355d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2e3efa6ecfc23e341d63516f130106b230702f4fd32c9a12008c63e0a3314260",
    "cross_cats_sorted": [
      "astro-ph.HE",
      "gr-qc"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2016-09-26T20:42:29Z",
    "title_canon_sha256": "e29b1f9e5dbbae3b69058e50619dd5c4b5c4cc3e12d13575afbac4b9cacfd132"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1609.09400",
    "kind": "arxiv",
    "version": 1
  }
}