Pith Number

pith:C7WWOMCF

pith:2011:C7WWOMCFWDUZLNJZS5VPBO5RYZ

not attested not anchored not stored refs pending

Recovering Model Structures from Large Low Rank and Sparse Covariance Matrix Estimation

Xi Luo

arxiv:1111.1133 v2 · 2011-11-04 · stat.ME · q-fin.PM · q-fin.ST

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

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	2026-05-18T02:21:34.908599Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

17ed673045b0e995b539976af0bbb1c666cbb21f100ff19e295e10582a595fe9

Aliases

arxiv: 1111.1133 · arxiv_version: 1111.1133v2 · doi: 10.48550/arxiv.1111.1133 · pith_short_12: C7WWOMCFWDUZ · pith_short_16: C7WWOMCFWDUZLNJZ · pith_short_8: C7WWOMCF

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/C7WWOMCFWDUZLNJZS5VPBO5RYZ \
  | 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: 17ed673045b0e995b539976af0bbb1c666cbb21f100ff19e295e10582a595fe9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8f45c7db41ea3a198078b1d55d26ab4a123549d565086eb9cdda03df20f859cc",
    "cross_cats_sorted": [
      "q-fin.PM",
      "q-fin.ST"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2011-11-04T14:12:49Z",
    "title_canon_sha256": "d9134888069dec2b11fa8022a7ecceedad10d622bdc89592ffb1ac19abe27227"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1111.1133",
    "kind": "arxiv",
    "version": 2
  }
}