Pith Number

pith:2FBFDHOG

pith:2020:2FBFDHOGZLYYAHZ3Y5N75MDFM6

not attested not anchored not stored refs pending

What Can We Estimate from Fatality and Infectious Case Data using the Susceptible-Infected-Removed (SIR) model? A case Study of Covid-19 Pandemic

Ali Demirci, Ayse Humeyra Bilge, Ayse Peker-Dobie, Onder Ergonul, Semra Ahmetolan

arxiv:2004.13178 v2 · 2020-04-27 · q-bio.PE · q-bio.QM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2FBFDHOGZLYYAHZ3Y5N75MDFM6}

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	2026-07-05T01:17:40.857797Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d142519dc6caf1801f3bc75bfeb0656788bfb71f6280ae5b373a496ba9b6f1e3

Aliases

arxiv: 2004.13178 · arxiv_version: 2004.13178v2 · doi: 10.48550/arxiv.2004.13178 · pith_short_12: 2FBFDHOGZLYY · pith_short_16: 2FBFDHOGZLYYAHZ3 · pith_short_8: 2FBFDHOG

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/2FBFDHOGZLYYAHZ3Y5N75MDFM6 \
  | 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: d142519dc6caf1801f3bc75bfeb0656788bfb71f6280ae5b373a496ba9b6f1e3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a94e6ec41cb08856265bf68b933a0acec62be875ab25ae0d3da1d21c0036accc",
    "cross_cats_sorted": [
      "q-bio.QM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2020-04-27T21:08:51Z",
    "title_canon_sha256": "b1865c41e318f52464e464719415a1d0349fc9913dba982f5ed2f78f9402ced8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.13178",
    "kind": "arxiv",
    "version": 2
  }
}