Pith Number

pith:OF7CW3ER

pith:2020:OF7CW3ER4SUZM3RD5IOSRTSG3R

not attested not anchored not stored refs pending

A modified age-structured SIR model for COVID-19 type viruses

Laura P. Schaposnik, Vishaal Ram

arxiv:2009.12219 v1 · 2020-09-23 · q-bio.PE · physics.soc-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OF7CW3ER4SUZM3RD5IOSRTSG3R}

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	2026-07-05T05:06:49.384359Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

717e2b6c91e4a9966e23ea1d28ce46dc5d96482388869db871cc64d7c8477cb5

Aliases

arxiv: 2009.12219 · arxiv_version: 2009.12219v1 · doi: 10.48550/arxiv.2009.12219 · pith_short_12: OF7CW3ER4SUZ · pith_short_16: OF7CW3ER4SUZM3RD · pith_short_8: OF7CW3ER

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/OF7CW3ER4SUZM3RD5IOSRTSG3R \
  | 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: 717e2b6c91e4a9966e23ea1d28ce46dc5d96482388869db871cc64d7c8477cb5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1da408b9c684479ed5b25e8c4605f9d710be7d15e3716bc2b830d2fa899c1726",
    "cross_cats_sorted": [
      "physics.soc-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2020-09-23T19:50:49Z",
    "title_canon_sha256": "e2a72bff71935702292bf5f6d93f0171cb55f51f50e263742a7afeb4a26c41f6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2009.12219",
    "kind": "arxiv",
    "version": 1
  }
}