Pith Number

pith:XA7AL3J4

pith:2020:XA7AL3J4UAXIJE7DNXQZZQVYNM

not attested not anchored not stored refs pending

Contact rate epidemic control of COVID-19: an equilibrium view

Emma Hubert, Gabriel Turinici, Romuald Elie

arxiv:2004.08221 v2 · 2020-04-17 · physics.soc-ph · math.OC · 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{XA7AL3J4UAXIJE7DNXQZZQVYNM}

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	2026-07-05T01:11:34.314239Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b83e05ed3ca02e8493e36de19cc2b86b205a5750c522506fab0576cfb55e73b8

Aliases

arxiv: 2004.08221 · arxiv_version: 2004.08221v2 · doi: 10.48550/arxiv.2004.08221 · pith_short_12: XA7AL3J4UAXI · pith_short_16: XA7AL3J4UAXIJE7D · pith_short_8: XA7AL3J4

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/XA7AL3J4UAXIJE7DNXQZZQVYNM \
  | 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: b83e05ed3ca02e8493e36de19cc2b86b205a5750c522506fab0576cfb55e73b8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "67f5accd648919eb32f1920c39817a36c4d995cb84f3f7bcd2c39a83521f6d7b",
    "cross_cats_sorted": [
      "math.OC",
      "q-bio.PE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2020-04-17T13:08:39Z",
    "title_canon_sha256": "444035b2d65d68b337d9c3fe1af57dd4f566cb3489bfcd4c238cb29b0996922c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.08221",
    "kind": "arxiv",
    "version": 2
  }
}