Pith Number

pith:QWJAZFUS

pith:2012:QWJAZFUSOI4XUSRFSN75ME2JCS

not attested not anchored not stored refs pending

The twin paradox in relativity revisited

Vasant Natarajan

arxiv:1204.5651 v2 · 2012-03-20 · physics.class-ph · physics.pop-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{QWJAZFUSOI4XUSRFSN75ME2JCS}

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	2026-05-18T03:51:48.496039Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85920c969272397a4a25937fd61349148babaff1f2293e317ea7f002aa681f9d

Aliases

arxiv: 1204.5651 · arxiv_version: 1204.5651v2 · doi: 10.48550/arxiv.1204.5651 · pith_short_12: QWJAZFUSOI4X · pith_short_16: QWJAZFUSOI4XUSRF · pith_short_8: QWJAZFUS

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/QWJAZFUSOI4XUSRFSN75ME2JCS \
  | 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: 85920c969272397a4a25937fd61349148babaff1f2293e317ea7f002aa681f9d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b261c6341f8851f15cadef766c280e7eaffc7c301669ba4ad4365a66b565a1d9",
    "cross_cats_sorted": [
      "physics.pop-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.class-ph",
    "submitted_at": "2012-03-20T11:50:21Z",
    "title_canon_sha256": "e0220e3f3134a01df7d13b09f8694fb3102df0553cd6e494856a185466f1aeb8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.5651",
    "kind": "arxiv",
    "version": 2
  }
}