Pith Number

pith:5S2W7MB3

pith:2026:5S2W7MB3UBKGPITBPA3DICMZCX

not attested not anchored not stored refs pending

Hydrodynamics constrain choanoflagellate collar geometry

Catherine Penington, Christian Thomas, Lyndon Koens, Tasawar Iqbal

arxiv:2605.25337 v1 · 2026-05-25 · physics.bio-ph · cond-mat.soft

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5S2W7MB3UBKGPITBPA3DICMZCX}

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	2026-05-26T02:04:29.500269Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ecb56fb03ba05467a261783634099915eca24850de5815967eaf2720ceda17f3

Aliases

arxiv: 2605.25337 · arxiv_version: 2605.25337v1 · doi: 10.48550/arxiv.2605.25337 · pith_short_12: 5S2W7MB3UBKG · pith_short_16: 5S2W7MB3UBKGPITB · pith_short_8: 5S2W7MB3

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/5S2W7MB3UBKGPITBPA3DICMZCX \
  | 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: ecb56fb03ba05467a261783634099915eca24850de5815967eaf2720ceda17f3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "98db30ae28679dd417a99febffffec08dc049089f8251cdb04ab1e7bd2b9493d",
    "cross_cats_sorted": [
      "cond-mat.soft"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.bio-ph",
    "submitted_at": "2026-05-25T01:42:40Z",
    "title_canon_sha256": "ba11a6d4b52f05b1b8cd86f20bcf561e95cf1778b11d55b96c72907f5cdbeae6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.25337",
    "kind": "arxiv",
    "version": 1
  }
}