Pith Number

pith:QGP4NGFS

pith:2004:QGP4NGFSBJJ7ETICMN6BUMELRF

not attested not anchored not stored refs pending

Novel steady state of a microtubule assembly in a confined geometry

Bindu S. Govindan, Jr. (Virginia Tech Applied Biosciences Center), William. B. Spillman

arxiv:q-bio/0401004 v1 · 2004-01-04 · q-bio.SC · q-bio.BM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QGP4NGFSBJJ7ETICMN6BUMELRF}

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	2026-05-18T03:47:09.372407Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

819fc698b20a53f24d02637c1a308b896ea8514c046f7f97a56ddca98e050bd1

Aliases

arxiv: q-bio/0401004 · arxiv_version: q-bio/0401004v1 · doi: 10.48550/arxiv.q-bio/0401004 · pith_short_12: QGP4NGFSBJJ7 · pith_short_16: QGP4NGFSBJJ7ETIC · pith_short_8: QGP4NGFS

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/QGP4NGFSBJJ7ETICMN6BUMELRF \
  | 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: 819fc698b20a53f24d02637c1a308b896ea8514c046f7f97a56ddca98e050bd1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8457357065f581b54c8d2460a00815f93b2b156d0dfec39c18f7c090f0218c59",
    "cross_cats_sorted": [
      "q-bio.BM"
    ],
    "license": "",
    "primary_cat": "q-bio.SC",
    "submitted_at": "2004-01-04T21:20:01Z",
    "title_canon_sha256": "a375cc3a634e6c3bb2bf401849bb2cd84dc6f53afea57991f31e1f0c49521a45"
  },
  "schema_version": "1.0",
  "source": {
    "id": "q-bio/0401004",
    "kind": "arxiv",
    "version": 1
  }
}