Pith Number

pith:WRNJB7CB

pith:2023:WRNJB7CBMX3YB7OHFW6JFP3BOM

not attested not anchored not stored refs pending

Optimal free-surface pumping by an undulating carpet

Anupam Pandey, Chris Roh, Daisuke Takagi, Jisoo Yuk, Sunghwan Jung, Sungyon Lee, Yuming Sun, Zih-Yin Chen

arxiv:2302.13223 v1 · 2023-02-26 · 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{WRNJB7CBMX3YB7OHFW6JFP3BOM}

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	2026-07-05T05:45:44.460792Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b45a90fc4165f780fdc72dbc92bf617326d9214279e2775abbe01fa029338aec

Aliases

arxiv: 2302.13223 · arxiv_version: 2302.13223v1 · doi: 10.48550/arxiv.2302.13223 · pith_short_12: WRNJB7CBMX3Y · pith_short_16: WRNJB7CBMX3YB7OH · pith_short_8: WRNJB7CB

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/WRNJB7CBMX3YB7OHFW6JFP3BOM \
  | 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: b45a90fc4165f780fdc72dbc92bf617326d9214279e2775abbe01fa029338aec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cfd5caf9052901b73a27211f2051abbb60a007dfebf548e78eff7bcd4b4350d6",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "physics.flu-dyn",
    "submitted_at": "2023-02-26T03:32:22Z",
    "title_canon_sha256": "958e2803ec55077d4c59aa168bbbd87833b132146620f071843d7d7897b5ce75"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2302.13223",
    "kind": "arxiv",
    "version": 1
  }
}