Pith Number

pith:US4W34JG

pith:2007:US4W34JGQHQHXWV3DAKKPXSBY6

not attested not anchored not stored refs pending

Transitions in the wake of a flapping foil

Jean-Luc Aider, Jos\'e Eduardo Wesfreid, Ramiro Godoy-Diana

arxiv:physics/0702219 v2 · 2007-02-26 · physics.flu-dyn

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{US4W34JGQHQHXWV3DAKKPXSBY6}

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	2026-05-18T04:08:52.549497Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a4b96df12681e07bdabb1814a7de41c790d7c97cfea18a9f50800256ae7cb16d

Aliases

arxiv: physics/0702219 · arxiv_version: physics/0702219v2 · doi: 10.48550/arxiv.physics/0702219 · pith_short_12: US4W34JGQHQH · pith_short_16: US4W34JGQHQHXWV3 · pith_short_8: US4W34JG

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/US4W34JGQHQHXWV3DAKKPXSBY6 \
  | 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: a4b96df12681e07bdabb1814a7de41c790d7c97cfea18a9f50800256ae7cb16d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "91a4920038fd662abad565059a37d92c7faefb0626f9241ac5c5ae63cc41ee98",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "physics.flu-dyn",
    "submitted_at": "2007-02-26T14:21:17Z",
    "title_canon_sha256": "5bcdb11d38f4b6a25c90858059c1cefacc2c5d10082df670863837e66baa8c05"
  },
  "schema_version": "1.0",
  "source": {
    "id": "physics/0702219",
    "kind": "arxiv",
    "version": 2
  }
}