Pith Number

pith:TFTII6MF

pith:2018:TFTII6MFU77VWXOSQF2IZJSFM7

not attested not anchored not stored refs pending

Mater certa est, pater numquam: What can Facebook Advertising Data Tell Us about Male Fertility Rates?

Emilio Zagheni, Francesco Billari, Francesco Rampazzo, Ingmar Weber, Maria Rita Testa

arxiv:1804.04632 v1 · 2018-04-12 · cs.CY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TFTII6MFU77VWXOSQF2IZJSFM7}

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	2026-05-18T00:18:36.675707Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9966847985a7ff5b5dd281748ca64567f5e6d92fe550fd681a1e463a7697d544

Aliases

arxiv: 1804.04632 · arxiv_version: 1804.04632v1 · doi: 10.48550/arxiv.1804.04632 · pith_short_12: TFTII6MFU77V · pith_short_16: TFTII6MFU77VWXOS · pith_short_8: TFTII6MF

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/TFTII6MFU77VWXOSQF2IZJSFM7 \
  | 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: 9966847985a7ff5b5dd281748ca64567f5e6d92fe550fd681a1e463a7697d544

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ca081663bbb2f22d883351e1b85b18acb0f5cf2742980482156e49cc55e1b7c6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CY",
    "submitted_at": "2018-04-12T17:03:36Z",
    "title_canon_sha256": "497fb404b1b2d13b4867bfbb84af3d736ae3c8424eea432fa48af3572a9ed6b3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.04632",
    "kind": "arxiv",
    "version": 1
  }
}