Pith Number

pith:F3RYNZ7Z

pith:2026:F3RYNZ7ZJYE45CACLR75HX24B4

not attested not anchored not stored refs pending

Fractal-based variable drag model for porous-media tree representations

Ryo Onishi, Takumi Tokiwa, Yuwei Yin

arxiv:2605.25096 v1 · 2026-05-24 · 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{F3RYNZ7ZJYE45CACLR75HX24B4}

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	2026-05-26T02:04:17.728214Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2ee386e7f94e09ce88025c7fd3df5c0f33ce3b2b165881fdddee57b75f1640aa

Aliases

arxiv: 2605.25096 · arxiv_version: 2605.25096v1 · doi: 10.48550/arxiv.2605.25096 · pith_short_12: F3RYNZ7ZJYE4 · pith_short_16: F3RYNZ7ZJYE45CAC · pith_short_8: F3RYNZ7Z

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/F3RYNZ7ZJYE45CACLR75HX24B4 \
  | 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: 2ee386e7f94e09ce88025c7fd3df5c0f33ce3b2b165881fdddee57b75f1640aa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "389af914f3146c5aa70a7c3a18d99ccc67da29a32ec71c204c946645f65e7ea9",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.flu-dyn",
    "submitted_at": "2026-05-24T14:17:13Z",
    "title_canon_sha256": "d1c54838d2afe4c7a24bbf8e0b85ed9bfc1e50d3b639a1e0c0239d7203609c4d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.25096",
    "kind": "arxiv",
    "version": 1
  }
}