Pith Number

pith:OV3QSF6O

pith:2009:OV3QSF6OIZTKMSCGT4GW64LYFO

not attested not anchored not stored refs pending

Drag reduction in pipe flow by optimal forcing

Ashley P. Willis, Carlo Cossu, Yongyun Hwang

arxiv:0908.3971 v1 · 2009-08-27 · 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{OV3QSF6OIZTKMSCGT4GW64LYFO}

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	2026-05-17T23:54:07.962831Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

75770917ce4666a648469f0d6f71782b95362856542a7b6957662c0a06c5cf14

Aliases

arxiv: 0908.3971 · arxiv_version: 0908.3971v1 · doi: 10.48550/arxiv.0908.3971 · pith_short_12: OV3QSF6OIZTK · pith_short_16: OV3QSF6OIZTKMSCG · pith_short_8: OV3QSF6O

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/OV3QSF6OIZTKMSCGT4GW64LYFO \
  | 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: 75770917ce4666a648469f0d6f71782b95362856542a7b6957662c0a06c5cf14

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "56c19203d911e50947867fc7bd6c9aa57e025df794ce71dd0693d11f6f362a52",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.flu-dyn",
    "submitted_at": "2009-08-27T10:17:08Z",
    "title_canon_sha256": "24e24d9fe8e880d346b4224b64642aca4ecb7f9c4bf9bf1f8917602b0ad317a5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.3971",
    "kind": "arxiv",
    "version": 1
  }
}