Pith Number

pith:VI2YYJLH

pith:2021:VI2YYJLHRWHBDCFMVN5S4S7U66

not attested not anchored not stored refs pending

Numerical study of COVID-19 spatial-temporal spreading in London

B. Xiang, C. C. Pain, F. Fang, H. Xiao, J. Li, J. Zheng, J. Zhu, P. F. Linden, X. Wu, Z. Wang

arxiv:2102.09902 v2 · 2021-02-19 · physics.med-ph · cs.CE · physics.flu-dyn

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VI2YYJLHRWHBDCFMVN5S4S7U66}

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	2026-07-05T02:37:36.432404Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

aa358c25678d8e1188acab7b2e4bf4f7b2c42c76e5908a32ca14f3afcbf2fc58

Aliases

arxiv: 2102.09902 · arxiv_version: 2102.09902v2 · doi: 10.48550/arxiv.2102.09902 · pith_short_12: VI2YYJLHRWHB · pith_short_16: VI2YYJLHRWHBDCFM · pith_short_8: VI2YYJLH

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/VI2YYJLHRWHBDCFMVN5S4S7U66 \
  | 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: aa358c25678d8e1188acab7b2e4bf4f7b2c42c76e5908a32ca14f3afcbf2fc58

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7ca11a7aab4f498d73bfb6eea2f771a15783f953d7fb4a8a979747ab89565e82",
    "cross_cats_sorted": [
      "cs.CE",
      "physics.flu-dyn"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.med-ph",
    "submitted_at": "2021-02-19T12:50:15Z",
    "title_canon_sha256": "1bf6a840c279290c411283fd348b623382aa2683bbb2324ada38306e4db790b2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.09902",
    "kind": "arxiv",
    "version": 2
  }
}