Pith Number

pith:Z45JGYH3

pith:2018:Z45JGYH3O7CJEIORIK5RQTXF35

not attested not anchored not stored refs pending

Sub-national levels and trends in contraceptive prevalence, unmet need, and demand for family planning in Nigeria with survey uncertainty

Fred Lu, Joshua L. Proctor, Laina D. Mercer

arxiv:1812.00022 v1 · 2018-11-30 · stat.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Z45JGYH3O7CJEIORIK5RQTXF35}

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	2026-05-17T23:59:27.554558Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cf3a9360fb77c49221d142bb184ee5df68cc4e04de1eeae9b336284e1bf4ea69

Aliases

arxiv: 1812.00022 · arxiv_version: 1812.00022v1 · doi: 10.48550/arxiv.1812.00022 · pith_short_12: Z45JGYH3O7CJ · pith_short_16: Z45JGYH3O7CJEIOR · pith_short_8: Z45JGYH3

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/Z45JGYH3O7CJEIORIK5RQTXF35 \
  | 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: cf3a9360fb77c49221d142bb184ee5df68cc4e04de1eeae9b336284e1bf4ea69

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4bf9e34027f7a7de749539ac011f77035eefa541700a3eb8494b843d939c23e1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.AP",
    "submitted_at": "2018-11-30T19:06:42Z",
    "title_canon_sha256": "bfecb0823c67fbf862a53c02271da6e855249f119b1b95e3fe68815865f6bdfd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.00022",
    "kind": "arxiv",
    "version": 1
  }
}