Pith Number

pith:2SZMRUFZ

pith:2019:2SZMRUFZQW5IFAETJEZO7KLPMA

not attested not anchored not stored refs pending

The basic reproduction number, $R_0$, in structured populations

Peter Neal, Thitiya Theparod

arxiv:1903.10353 v1 · 2019-03-22 · q-bio.PE · stat.ME

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2SZMRUFZQW5IFAETJEZO7KLPMA}

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	2026-05-17T23:50:29.737156Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d4b2c8d0b985ba8280934932efa96f6018e9bb622aeb6fe84317c08bab0926f4

Aliases

arxiv: 1903.10353 · arxiv_version: 1903.10353v1 · doi: 10.48550/arxiv.1903.10353 · pith_short_12: 2SZMRUFZQW5I · pith_short_16: 2SZMRUFZQW5IFAET · pith_short_8: 2SZMRUFZ

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/2SZMRUFZQW5IFAETJEZO7KLPMA \
  | 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: d4b2c8d0b985ba8280934932efa96f6018e9bb622aeb6fe84317c08bab0926f4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a4f63bad0c8fdff4388dcaee6692918d5ff2bfd7c17fcb6c288ca4ee6b87e90a",
    "cross_cats_sorted": [
      "stat.ME"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2019-03-22T12:23:00Z",
    "title_canon_sha256": "0bd17776b225a287f578c7a92dcfd587f3e832ff67a2519bee147a7aff879b9c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.10353",
    "kind": "arxiv",
    "version": 1
  }
}