Pith Number

pith:ZT2QVVFY

pith:2021:ZT2QVVFYAPINZNWXCEUHQFK237

not attested not anchored not stored refs pending

COVID-19 reproduction number estimated from SEIR model: association with people's mobility in 2020

Andrey Grunin, Dmitri Soshnikov, Tatiana Petrova

arxiv:2108.12222 v1 · 2021-08-27 · cs.SI · physics.soc-ph · 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{ZT2QVVFYAPINZNWXCEUHQFK237}

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	2026-07-05T03:09:23.384980Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ccf50ad4b803d0dcb6d7112878155adfcc635052662f72cfb2df9c1476c7cee4

Aliases

arxiv: 2108.12222 · arxiv_version: 2108.12222v1 · doi: 10.48550/arxiv.2108.12222 · pith_short_12: ZT2QVVFYAPIN · pith_short_16: ZT2QVVFYAPINZNWX · pith_short_8: ZT2QVVFY

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/ZT2QVVFYAPINZNWXCEUHQFK237 \
  | 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: ccf50ad4b803d0dcb6d7112878155adfcc635052662f72cfb2df9c1476c7cee4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "82d22c5e33521fab81a44fff860324b738474017a9a9431397f9ae437c2b3b2c",
    "cross_cats_sorted": [
      "physics.soc-ph",
      "q-bio.PE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SI",
    "submitted_at": "2021-08-27T11:23:23Z",
    "title_canon_sha256": "4633076ecedcc571794b3a3111d18e2eb30216a8810dc201bce2162c8a55d925"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2108.12222",
    "kind": "arxiv",
    "version": 1
  }
}