Pith Number

pith:PKPJU5CK

pith:2013:PKPJU5CKEJQJ2A64YFIJKX3JPR

not attested not anchored not stored refs pending

Cross-Validation for Nonlinear Mixed Effects Models

Emily Colby, Eric Bair

arxiv:1304.2828 v1 · 2013-04-10 · stat.ME · 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{PKPJU5CKEJQJ2A64YFIJKX3JPR}

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	2026-05-18T03:25:05.468586Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7a9e9a744a22609d03dcc150955f697c5cb11ca82f47ebe1755efaf5104eeb8b

Aliases

arxiv: 1304.2828 · arxiv_version: 1304.2828v1 · doi: 10.48550/arxiv.1304.2828 · pith_short_12: PKPJU5CKEJQJ · pith_short_16: PKPJU5CKEJQJ2A64 · pith_short_8: PKPJU5CK

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/PKPJU5CKEJQJ2A64YFIJKX3JPR \
  | 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: 7a9e9a744a22609d03dcc150955f697c5cb11ca82f47ebe1755efaf5104eeb8b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f65373f03308cae1123ff8e55e1d565459704d3b95f05f34414ef35391cb44b1",
    "cross_cats_sorted": [
      "stat.AP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2013-04-10T01:57:21Z",
    "title_canon_sha256": "2cd394cc69abb6635aad3840719ffb2e6a4ed2e27f528152c8f9ec93a5a3f72b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.2828",
    "kind": "arxiv",
    "version": 1
  }
}