Pith Number

pith:SYTHCX4I

pith:2010:SYTHCX4IKK5KXZ7LETKAEODDTS

not attested not anchored not stored refs pending

Fast Bivariate Penalized Splines: the Sandwich Smoother

David Ruppert, Luo Xiao, Yingxing Li

arxiv:1011.4916 v2 · 2010-11-22 · stat.ME · math.ST · 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{SYTHCX4IKK5KXZ7LETKAEODDTS}

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	2026-05-18T03:22:19.229854Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9626715f8852baabe7eb24d40238639c94f4fe00fda3f500bd1b00411d4c21fe

Aliases

arxiv: 1011.4916 · arxiv_version: 1011.4916v2 · doi: 10.48550/arxiv.1011.4916 · pith_short_12: SYTHCX4IKK5K · pith_short_16: SYTHCX4IKK5KXZ7L · pith_short_8: SYTHCX4I

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/SYTHCX4IKK5KXZ7LETKAEODDTS \
  | 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: 9626715f8852baabe7eb24d40238639c94f4fe00fda3f500bd1b00411d4c21fe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "adbbd32f7fd9880f0f8648beddfd0705dad7f7ced4de43f1b2318aac53d5dedb",
    "cross_cats_sorted": [
      "math.ST",
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2010-11-22T19:34:07Z",
    "title_canon_sha256": "38f19421518b2bb5cf07628bf82095f0f2e1aa4ec332ba2a615247f1c40fd712"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1011.4916",
    "kind": "arxiv",
    "version": 2
  }
}