Pith Number

pith:IP63ZZ2Y

pith:2007:IP63ZZ2YW26V4OA3QLNDA6ZRF6

not attested not anchored not stored refs pending

Extinction risk and structure of a food web model

2), A. P\c{e}kalski (1), Gen\`eve, I. Bena (2), J. Szwabi\'nski (1, M. Droz (2) ((1) Institute of Theoretical Physics, Poland (2) D\'epartement de Physique Th\'eorique, Switzerland), Universit\'e de Gen\`eve, University of Wroc{\l}aw, Wroc{\l}aw

arxiv:0712.2654 v1 · 2007-12-17 · q-bio.PE · cond-mat.stat-mech · physics.bio-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IP63ZZ2YW26V4OA3QLNDA6ZRF6}

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	2026-07-04T17:07:15.937044Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

43fdbce758b6bd5e381b82da307b312f9097c4c652f63f27d1b7791ece662164

Aliases

arxiv: 0712.2654 · arxiv_version: 0712.2654v1 · doi: 10.48550/arxiv.0712.2654 · pith_short_12: IP63ZZ2YW26V · pith_short_16: IP63ZZ2YW26V4OA3 · pith_short_8: IP63ZZ2Y

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/IP63ZZ2YW26V4OA3QLNDA6ZRF6 \
  | 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: 43fdbce758b6bd5e381b82da307b312f9097c4c652f63f27d1b7791ece662164

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1905a7072da5e61e6eab9e558da15c820dab8252cb522bb0bc56380bebbcc239",
    "cross_cats_sorted": [
      "cond-mat.stat-mech",
      "physics.bio-ph"
    ],
    "license": "",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2007-12-17T09:01:49Z",
    "title_canon_sha256": "f8c4b122e1acab6f5b5009661eaaf3d9fc971249b28de3fff3bd71decfb6ba3e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0712.2654",
    "kind": "arxiv",
    "version": 1
  }
}