Pith Number

pith:PY4VF4X7

pith:2021:PY4VF4X7EBESG4TEKGRQVX2NID

not attested not anchored not stored refs pending

A Tale of Two Countries: A Longitudinal Cross-Country Study of Mobile Users' Reactions to the COVID-19 Pandemic Through the Lens of App Popularity

Fei Lyu, Gareth Tyson, Haoyu Wang, Liu Wang, Yi Wang

arxiv:2102.06528 v2 · 2021-02-10 · cs.SI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PY4VF4X7EBESG4TEKGRQVX2NID}

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	2026-07-05T02:27:41.750102Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7e3952f2ff204923726451a30adf4d40ebece47dd87b08f2cc07a92082a10866

Aliases

arxiv: 2102.06528 · arxiv_version: 2102.06528v2 · doi: 10.48550/arxiv.2102.06528 · pith_short_12: PY4VF4X7EBES · pith_short_16: PY4VF4X7EBESG4TE · pith_short_8: PY4VF4X7

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/PY4VF4X7EBESG4TEKGRQVX2NID \
  | 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: 7e3952f2ff204923726451a30adf4d40ebece47dd87b08f2cc07a92082a10866

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ac4416845bff23f5385f5dd30418d52d75a1ab61223f27e4a32239321514eb3f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SI",
    "submitted_at": "2021-02-10T12:12:23Z",
    "title_canon_sha256": "44d22a607ffbb93a130d9ab23d1d00e76d0a363bddae849db72797be9b89cade"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.06528",
    "kind": "arxiv",
    "version": 2
  }
}