Pith Number

pith:7POGSPNG

pith:2020:7POGSPNGMPOLQT2Z4QCKMJSP5L

not attested not anchored not stored refs pending

A multi-group SEIRA model for the spread of COVID-19 among heterogeneous populations

Alvaro Olivera-Nappa, David Medina-Ortiz, H. Andres Villavicencio, Juan Pablo Biron-Lattes, Sebastian Contreras

arxiv:2004.13452 v1 · 2020-04-28 · q-bio.PE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7POGSPNGMPOLQT2Z4QCKMJSP5L}

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	2026-07-05T03:19:39.100040Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fbdc693da663dcb84f59e404a6264feae9ac982339871412f45b32094bc03444

Aliases

arxiv: 2004.13452 · arxiv_version: 2004.13452v1 · doi: 10.48550/arxiv.2004.13452 · pith_short_12: 7POGSPNGMPOL · pith_short_16: 7POGSPNGMPOLQT2Z · pith_short_8: 7POGSPNG

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/7POGSPNGMPOLQT2Z4QCKMJSP5L \
  | 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: fbdc693da663dcb84f59e404a6264feae9ac982339871412f45b32094bc03444

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "44089c6f5817f34091a7972ed514d5fa0d5568967318b7f1a58cc16eaf71eee1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2020-04-28T12:11:50Z",
    "title_canon_sha256": "0aca04bef6d35577ae72cb0a4ca558dfaf481379dbf49366b1c3c16419d37c5d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.13452",
    "kind": "arxiv",
    "version": 1
  }
}