Pith Number

pith:WMJLI2DM

pith:2025:WMJLI2DMVUVYH3YPNBCWRZQHJM

not attested not anchored not stored refs pending

PoPStat-COVID19: Leveraging Population Pyramids to Quantify Demographic Vulnerability to COVID-19

Athulya Ratnayake, Buddhi Wijenayake, Insoha Alwis, Lelumi Edirisinghe, Parakrama Ekanayake, Roshan Godaliyadda, Samath Dharmaratne, Supun Manathunga, Tharaka Fonseka, Uditha Wijeratne, Vijitha Herath

arxiv:2509.14213 v2 · 2025-09-17 · stat.AP · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WMJLI2DMVUVYH3YPNBCWRZQHJM}

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	2026-07-20T01:18:20.308184Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b312b4686cad2b83ef0f684568e6074b15532acac39186e93a426b65f2745b48

Aliases

arxiv: 2509.14213 · arxiv_version: 2509.14213v2 · doi: 10.48550/arxiv.2509.14213 · pith_short_12: WMJLI2DMVUVY · pith_short_16: WMJLI2DMVUVYH3YP · pith_short_8: WMJLI2DM

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/WMJLI2DMVUVYH3YPNBCWRZQHJM \
  | 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: b312b4686cad2b83ef0f684568e6074b15532acac39186e93a426b65f2745b48

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "db670ded881be4e8caa19a25dcf03fa829117a93b35cf924df1c2d0cf9eb89fb",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.AP",
    "submitted_at": "2025-09-17T17:46:13Z",
    "title_canon_sha256": "b745953373278399dd8011ae651693fa0cb21bd220e929f739943a94f431e148"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2509.14213",
    "kind": "arxiv",
    "version": 2
  }
}