Pith Number

pith:QQPLTKJK

pith:2018:QQPLTKJK5VH3ZNFIFOECRVPWAE

not attested not anchored not stored refs pending

Hydrodynamic Lift on Boats

Joseph L. McCauley

arxiv:1808.03313 v2 · 2018-08-08 · physics.pop-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{QQPLTKJK5VH3ZNFIFOECRVPWAE}

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	2026-05-17T23:54:22.672023Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

841eb9a92aed4fbcb4a82b8828d5f60133393fea4818b5296e4e8b03d857c220

Aliases

arxiv: 1808.03313 · arxiv_version: 1808.03313v2 · doi: 10.48550/arxiv.1808.03313 · pith_short_12: QQPLTKJK5VH3 · pith_short_16: QQPLTKJK5VH3ZNFI · pith_short_8: QQPLTKJK

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/QQPLTKJK5VH3ZNFIFOECRVPWAE \
  | 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: 841eb9a92aed4fbcb4a82b8828d5f60133393fea4818b5296e4e8b03d857c220

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2b569f9836209dbe72220c9f38b4af373dd6a079b1a3f69e3fcda80deecd267e",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/publicdomain/zero/1.0/",
    "primary_cat": "physics.pop-ph",
    "submitted_at": "2018-08-08T15:48:14Z",
    "title_canon_sha256": "0e7dd0abf86eb55589332c17070a47eb44312044c652cf618765132f0d8a49e5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.03313",
    "kind": "arxiv",
    "version": 2
  }
}