Pith Number

pith:7AIJDICB

pith:2021:7AIJDICBVWMLTDL724LKCXM3V5

not attested not anchored not stored refs pending

Epidemiological and public health requirements for COVID-19 contact tracing apps and their evaluation

Adam Kucharski, Christophe Fraser, Chris Wymant, Ciro Cattuto, David Bonsall, Eva Grill, Katrina Lythgoe, Luca Ferretti, Lucie Abeler-D\"orner, Michelle Kendall, Rafael Mikolajczyk, Steven Riley, Vittoria Colizza

arxiv:2102.05445 v1 · 2021-02-10 · cs.CY · 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{7AIJDICBVWMLTDL724LKCXM3V5}

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	2026-07-05T02:14:18.774896Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f81091a041ad98b98d7fd716a15d9baf7733575383e417cbc9eb5a578f40d677

Aliases

arxiv: 2102.05445 · arxiv_version: 2102.05445v1 · doi: 10.48550/arxiv.2102.05445 · pith_short_12: 7AIJDICBVWML · pith_short_16: 7AIJDICBVWMLTDL7 · pith_short_8: 7AIJDICB

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/7AIJDICBVWMLTDL724LKCXM3V5 \
  | 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: f81091a041ad98b98d7fd716a15d9baf7733575383e417cbc9eb5a578f40d677

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "10a064aa2df740833d7e7237bad884cca14f9b4ea63e2d2c73b035586bb6f144",
    "cross_cats_sorted": [
      "cs.SI",
      "physics.soc-ph",
      "q-bio.PE"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "cs.CY",
    "submitted_at": "2021-02-10T14:08:34Z",
    "title_canon_sha256": "1533417f5e424048a7a4754a11ce3d5a6ee5d496efc2a23149f1d4339eabc386"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.05445",
    "kind": "arxiv",
    "version": 1
  }
}