Pith Number

pith:34A6VHPV

pith:2019:34A6VHPVTICUHPCIAC7PUWAFVU

not attested not anchored not stored refs pending

Estimating linear covariance models with numerical nonlinear algebra

Bernd Sturmfels, Piotr Zwiernik, Sascha Timme

arxiv:1909.00566 v1 · 2019-09-02 · stat.CO · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{34A6VHPVTICUHPCIAC7PUWAFVU}

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	2026-07-05T01:40:21.378237Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

df01ea9df59a0543bc4800befa5805ad22ab9e13062d6804f62c29eafd06fdc4

Aliases

arxiv: 1909.00566 · arxiv_version: 1909.00566v1 · doi: 10.48550/arxiv.1909.00566 · pith_short_12: 34A6VHPVTICU · pith_short_16: 34A6VHPVTICUHPCI · pith_short_8: 34A6VHPV

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/34A6VHPVTICUHPCIAC7PUWAFVU \
  | 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: df01ea9df59a0543bc4800befa5805ad22ab9e13062d6804f62c29eafd06fdc4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9a686b0e390d6524cdedb08f6e3ef73e200912b89e60a436fd62e3c3493853ed",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.CO",
    "submitted_at": "2019-09-02T06:56:41Z",
    "title_canon_sha256": "00477c7ea7d6fdb77871f9bcbe43b55d132f387513260733813d867e10a1a176"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.00566",
    "kind": "arxiv",
    "version": 1
  }
}