Pith Number

pith:5RUJNDQA

pith:2019:5RUJNDQAYN3CCU3R6ZQRAG4MWK

not attested not anchored not stored refs pending

A greedy algorithm for sparse precision matrix approximation

Didi Lv, Xiaoqun Zhang

arxiv:1907.00723 v1 · 2019-07-01 · math.ST · stat.TH

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\usepackage{pith}
\pithnumber{5RUJNDQAYN3CCU3R6ZQRAG4MWK}

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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.

Cited by

1 paper in Pith

A greedy algorithm for sparse precision matrix approximation

Receipt and verification

First computed	2026-05-17T23:41:48.325398Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ec68968e00c376215371f661101b8cb2bf754b2113ce1157ca42f007f25fd63d

Aliases

arxiv: 1907.00723 · arxiv_version: 1907.00723v1 · doi: 10.48550/arxiv.1907.00723 · pith_short_12: 5RUJNDQAYN3C · pith_short_16: 5RUJNDQAYN3CCU3R · pith_short_8: 5RUJNDQA

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/5RUJNDQAYN3CCU3R6ZQRAG4MWK \
  | 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: ec68968e00c376215371f661101b8cb2bf754b2113ce1157ca42f007f25fd63d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "52df51397e89937554561b5f6a008cc3f44977217ea4631888249c0fe671f803",
    "cross_cats_sorted": [
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.ST",
    "submitted_at": "2019-07-01T12:37:46Z",
    "title_canon_sha256": "f58caa9173aebc475eb182c062159718ee187d4d14a2659416d61c4163e15aec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.00723",
    "kind": "arxiv",
    "version": 1
  }
}