Pith Number

pith:5W662SOE

pith:2017:5W662SOEATX55MDDMVBKOZ3B2N

not attested not anchored not stored refs pending

Multidimensional Rational Covariance Extension with Approximate Covariance Matching

Anders Lindquist, Axel Ringh, Johan Karlsson

arxiv:1704.08326 v2 · 2017-04-26 · math.OC · math.FA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5W662SOEATX55MDDMVBKOZ3B2N}

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	2026-05-18T00:15:47.354540Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

edbded49c404efdeb0636542a76761d34825c85634716198f7028813c48d4b1e

Aliases

arxiv: 1704.08326 · arxiv_version: 1704.08326v2 · doi: 10.48550/arxiv.1704.08326 · pith_short_12: 5W662SOEATX5 · pith_short_16: 5W662SOEATX55MDD · pith_short_8: 5W662SOE

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/5W662SOEATX55MDDMVBKOZ3B2N \
  | 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: edbded49c404efdeb0636542a76761d34825c85634716198f7028813c48d4b1e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "75e9583d122d7d192648b9e34c7229ed91f85850e5073968abcb674375319d0b",
    "cross_cats_sorted": [
      "math.FA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2017-04-26T19:48:46Z",
    "title_canon_sha256": "b6c9ab987e974b26fc5e37b18dbe9190cf1a678371f9200a83f3b8a8ef0d056b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1704.08326",
    "kind": "arxiv",
    "version": 2
  }
}