Pith Number

pith:3SS6AG3N

pith:2020:3SS6AG3NOQNBVQJPTWMHEWCPIL

not attested not anchored not stored refs pending

A simplified estimate of the Effective Reproduction Number $R_t$ using its relation with the doubling time and application to Italian COVID-19 data

Antonio Zoccoli, Daniele Pedrini, Dario Menasce, Gianluca Bonifazi, Luca Lista, Mauro Mezzetto, Roberto Spighi

arxiv:2012.05194 v3 · 2020-12-09 · physics.soc-ph · q-bio.PE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3SS6AG3NOQNBVQJPTWMHEWCPIL}

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	2026-07-05T02:33:07.019744Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dca5e01b6d741a1ac12f9d9872584f42e807fe559b4868921ffbffc11e691d3a

Aliases

arxiv: 2012.05194 · arxiv_version: 2012.05194v3 · doi: 10.48550/arxiv.2012.05194 · pith_short_12: 3SS6AG3NOQNB · pith_short_16: 3SS6AG3NOQNBVQJP · pith_short_8: 3SS6AG3N

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/3SS6AG3NOQNBVQJPTWMHEWCPIL \
  | 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: dca5e01b6d741a1ac12f9d9872584f42e807fe559b4868921ffbffc11e691d3a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "494df258495cd0c6879f4505a84b3de7e140eee3ee12a69e82001024f012533c",
    "cross_cats_sorted": [
      "q-bio.PE"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2020-12-09T17:41:10Z",
    "title_canon_sha256": "58e034eccbdf6befcb0473be8eea4cddcc9f829ebeafa76bfe7cd853daf84c04"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2012.05194",
    "kind": "arxiv",
    "version": 3
  }
}