Pith Number

pith:OPSPQ6J7

pith:2013:OPSPQ6J7UDD2RHGXR4NELP5JKR

not attested not anchored not stored refs pending

Smoothing splines with varying smoothing parameter

Jinglai Shen, Pang Du, Xiao Wang

arxiv:1306.1868 v1 · 2013-06-08 · math.ST · stat.ME · stat.TH

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OPSPQ6J7UDD2RHGXR4NELP5JKR}

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	2026-05-18T03:21:23.035604Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

73e4f8793fa0c7a89cd78f1a45bfa9544dbbfe0a8a16f3dad6ebb5b6c21d3238

Aliases

arxiv: 1306.1868 · arxiv_version: 1306.1868v1 · doi: 10.48550/arxiv.1306.1868 · pith_short_12: OPSPQ6J7UDD2 · pith_short_16: OPSPQ6J7UDD2RHGX · pith_short_8: OPSPQ6J7

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/OPSPQ6J7UDD2RHGXR4NELP5JKR \
  | 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: 73e4f8793fa0c7a89cd78f1a45bfa9544dbbfe0a8a16f3dad6ebb5b6c21d3238

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "74efff924d9d5a9f82c0e8cc50db3ef8417b7e986313dd74b2b28ce678eada4e",
    "cross_cats_sorted": [
      "stat.ME",
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.ST",
    "submitted_at": "2013-06-08T01:52:31Z",
    "title_canon_sha256": "4724aa67862c600406f03b428a5b517484ce047200b4653d54a413fc7e4a093d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.1868",
    "kind": "arxiv",
    "version": 1
  }
}