Pith Number

pith:K3W5NU7A

pith:2009:K3W5NU7A3IXMILWGSCGZ3W43II

not attested not anchored not stored refs pending

The twin paradox in a cosmological context

O. Gron, S. Braeck

arxiv:0909.5364 v4 · 2009-09-29 · gr-qc · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{K3W5NU7A3IXMILWGSCGZ3W43II}

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	2026-05-18T04:12:44.973082Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

56edd6d3e0da2ec42ec6908d9ddb9b4202224777fc9cd06f62d93481c2fd573b

Aliases

arxiv: 0909.5364 · arxiv_version: 0909.5364v4 · doi: 10.48550/arxiv.0909.5364 · pith_short_12: K3W5NU7A3IXM · pith_short_16: K3W5NU7A3IXMILWG · pith_short_8: K3W5NU7A

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/K3W5NU7A3IXMILWGSCGZ3W43II \
  | 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: 56edd6d3e0da2ec42ec6908d9ddb9b4202224777fc9cd06f62d93481c2fd573b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fecd3d11d998fa95df29a4e9b75f58e3569059d8dcb949c77448c71a97cced66",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2009-09-29T15:42:44Z",
    "title_canon_sha256": "5d3d25f896f36314d5d57a13f33168e930173faabca3aa094c5f55a75ce41e85"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.5364",
    "kind": "arxiv",
    "version": 4
  }
}