Pith Number

pith:QR2KSZOU

pith:2011:QR2KSZOUOL6MOU4HSVST3VNYUN

not attested not anchored not stored refs pending

Of lice and math: using models to understand and control populations of head lice

Mar\'ia Fabiana Laguna, Sebasti\'an Risau-Gusman

arxiv:1104.4775 v2 · 2011-04-25 · q-bio.PE · stat.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QR2KSZOUOL6MOU4HSVST3VNYUN}

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	2026-05-18T02:22:00.986897Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8474a965d472fcc7538795653dd5b8a35c1d2c213bd45d95a60bb81e58cdbd87

Aliases

arxiv: 1104.4775 · arxiv_version: 1104.4775v2 · doi: 10.48550/arxiv.1104.4775 · pith_short_12: QR2KSZOUOL6M · pith_short_16: QR2KSZOUOL6MOU4H · pith_short_8: QR2KSZOU

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/QR2KSZOUOL6MOU4HSVST3VNYUN \
  | 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: 8474a965d472fcc7538795653dd5b8a35c1d2c213bd45d95a60bb81e58cdbd87

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c40476eb7c320eddee9797baa47ad9230058a5546dffcb1f96dc0e387dbe5d02",
    "cross_cats_sorted": [
      "stat.AP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2011-04-25T19:05:36Z",
    "title_canon_sha256": "608cda188190b997a1d141371aa350ed1a6f16b43ce5f3aeacd399fec4a857c6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.4775",
    "kind": "arxiv",
    "version": 2
  }
}