Pith Number

pith:VO4N7JWM

pith:2012:VO4N7JWMQRUOTCYRBYXZOMKKNS

not attested not anchored not stored refs pending

Air expansion in the water rocket

Alejandro Romanelli, Federico Gonz\'alez Madina, Italo Bove

arxiv:1211.1923 v1 · 2012-11-08 · physics.flu-dyn · physics.class-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{VO4N7JWMQRUOTCYRBYXZOMKKNS}

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	2026-05-18T01:53:17.881696Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

abb8dfa6cc8468e98b110e2f97314a6c8651cbcbf4019f2900726a1097f768b9

Aliases

arxiv: 1211.1923 · arxiv_version: 1211.1923v1 · doi: 10.48550/arxiv.1211.1923 · pith_short_12: VO4N7JWMQRUO · pith_short_16: VO4N7JWMQRUOTCYR · pith_short_8: VO4N7JWM

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/VO4N7JWMQRUOTCYRBYXZOMKKNS \
  | 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: abb8dfa6cc8468e98b110e2f97314a6c8651cbcbf4019f2900726a1097f768b9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b6c696d73c0e78c7f16ed59d67d2dcc3eaf6d7fc1e4e5d5d58901e0cd882e832",
    "cross_cats_sorted": [
      "physics.class-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.flu-dyn",
    "submitted_at": "2012-11-08T17:56:44Z",
    "title_canon_sha256": "774a5687a3cd3b445343689ed41b42ffd2f5d9bdfdba132f85eca6279fd96086"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.1923",
    "kind": "arxiv",
    "version": 1
  }
}