Pith Number

pith:QQHLQKSU

pith:2015:QQHLQKSUPJ63RZCC22QAAVISA3

not attested not anchored not stored refs pending

A Different Approach to the Problem of Missing Data

Norman Matloff, Xiao Gu

arxiv:1509.04992 v1 · 2015-09-16 · 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{QQHLQKSUPJ63RZCC22QAAVISA3}

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	2026-05-18T01:32:51.157762Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

840eb82a547a7db8e442d6a000551206f7633c6218bba6cf713dbc35372189ec

Aliases

arxiv: 1509.04992 · arxiv_version: 1509.04992v1 · doi: 10.48550/arxiv.1509.04992 · pith_short_12: QQHLQKSUPJ63 · pith_short_16: QQHLQKSUPJ63RZCC · pith_short_8: QQHLQKSU

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/QQHLQKSUPJ63RZCC22QAAVISA3 \
  | 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: 840eb82a547a7db8e442d6a000551206f7633c6218bba6cf713dbc35372189ec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "84b9099d448438dec21331089698de3bf25ff68ad44bfe4c54dac5045f4b8182",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2015-09-16T18:23:20Z",
    "title_canon_sha256": "ca95b7ddbf44589d8b825e516eb189f32a87ec3b4ed07b25428cefa0d4019837"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.04992",
    "kind": "arxiv",
    "version": 1
  }
}