Pith Number

pith:7AMWH6UP

pith:2017:7AMWH6UPHT4BV7DUKG3NOAWTFP

not attested not anchored not stored refs pending

A sparse linear algebra algorithm for fast computation of prediction variances with Gaussian Markov random fields

Andrew Zammit-Mangion, Jonathan Rougier

arxiv:1707.00892 v3 · 2017-07-04 · stat.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7AMWH6UPHT4BV7DUKG3NOAWTFP}

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	2026-05-18T00:24:10.051335Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f81963fa8f3cf81afc7451b6d702d32bf07fbdd48d707638cafd17564b2ccd41

Aliases

arxiv: 1707.00892 · arxiv_version: 1707.00892v3 · doi: 10.48550/arxiv.1707.00892 · pith_short_12: 7AMWH6UPHT4B · pith_short_16: 7AMWH6UPHT4BV7DU · pith_short_8: 7AMWH6UP

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/7AMWH6UPHT4BV7DUKG3NOAWTFP \
  | 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: f81963fa8f3cf81afc7451b6d702d32bf07fbdd48d707638cafd17564b2ccd41

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6902706f3eaccadb25634c5622a3b620d9b0301d46c4d089bddc5d5b95b61806",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.CO",
    "submitted_at": "2017-07-04T10:15:01Z",
    "title_canon_sha256": "958ce6a5aa3613dc92dbd497aad00f3293511e89b4182d2d46a7c4326ca3fa16"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.00892",
    "kind": "arxiv",
    "version": 3
  }
}