Pith Number

pith:QQRPRFJE

pith:2018:QQRPRFJEOMVBVD6OHYAODPMF7W

not attested not anchored not stored refs pending

Helical vortices generated by flapping wings of bumblebees

D. Kolomenskiy, F.-O. Lehmann, J. Sesterhenn, K. Schneider, M. Farge, T. Engels

arxiv:1803.07330 v1 · 2018-03-20 · 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{QQRPRFJEOMVBVD6OHYAODPMF7W}

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	2026-05-18T00:20:33.620279Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8422f89524732a1a8fce3e00e1bd85fdb702efa2a971fce83edbcfdcf4589c92

Aliases

arxiv: 1803.07330 · arxiv_version: 1803.07330v1 · doi: 10.48550/arxiv.1803.07330 · pith_short_12: QQRPRFJEOMVB · pith_short_16: QQRPRFJEOMVBVD6O · pith_short_8: QQRPRFJE

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/QQRPRFJEOMVBVD6OHYAODPMF7W \
  | 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: 8422f89524732a1a8fce3e00e1bd85fdb702efa2a971fce83edbcfdcf4589c92

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "015edfe723b376de76cbbf878198f6b57ac457156dfaafc3cee703aafaf77f1b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.flu-dyn",
    "submitted_at": "2018-03-20T09:43:04Z",
    "title_canon_sha256": "11af343ea5fb0c42d0e7ecdac6a3c22fa99b4ce4290063955f6aac556f3aee85"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.07330",
    "kind": "arxiv",
    "version": 1
  }
}