Pith Number

pith:IRJ5567B

pith:2011:IRJ5567B75Q77BK3BJDPH6K2WD

not attested not anchored not stored refs pending

Optimal Strouhal number for swimming animals

Christophe Eloy

arxiv:1102.0223 v1 · 2011-02-01 · physics.flu-dyn · physics.bio-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IRJ5567B75Q77BK3BJDPH6K2WD}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T02:22:41.355147Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4453defbe1ff61ff855b0a46f3f95ab0f9fab4026a88a006f8c215c2d66560a4

Aliases

arxiv: 1102.0223 · arxiv_version: 1102.0223v1 · doi: 10.48550/arxiv.1102.0223 · pith_short_12: IRJ5567B75Q7 · pith_short_16: IRJ5567B75Q77BK3 · pith_short_8: IRJ5567B

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/IRJ5567B75Q77BK3BJDPH6K2WD \
  | 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: 4453defbe1ff61ff855b0a46f3f95ab0f9fab4026a88a006f8c215c2d66560a4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dc6173dc3b60e3851294dd097bf9082575c06265ebb4196f9a647ea4e0ef3454",
    "cross_cats_sorted": [
      "physics.bio-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.flu-dyn",
    "submitted_at": "2011-02-01T17:22:36Z",
    "title_canon_sha256": "bc4052eac9a25d6bd4eddc052aa4935d5196e7b720486b93691be9918c8c9483"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.0223",
    "kind": "arxiv",
    "version": 1
  }
}