Pith Number

pith:NGHYUOFB

pith:2018:NGHYUOFBXU42W3IJW27LPJ2BA5

not attested not anchored not stored refs pending

Improving Portfolios Global Performance with Robust Covariance Matrix Estimation: Application to the Maximum Variety Portfolio

Emmanuelle Jay, Eug\'enie Terreaux, Fr\'ed\'eric Pascal, Jean-Philippe Ovarlez

arxiv:1804.00191 v1 · 2018-03-31 · stat.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NGHYUOFBXU42W3IJW27LPJ2BA5}

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	2026-05-18T00:19:38.090485Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

698f8a38a1bd39ab6d09b6beb7a741074d0b71bedf0c2b8d249a8351c726e736

Aliases

arxiv: 1804.00191 · arxiv_version: 1804.00191v1 · doi: 10.48550/arxiv.1804.00191 · pith_short_12: NGHYUOFBXU42 · pith_short_16: NGHYUOFBXU42W3IJ · pith_short_8: NGHYUOFB

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/NGHYUOFBXU42W3IJW27LPJ2BA5 \
  | 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: 698f8a38a1bd39ab6d09b6beb7a741074d0b71bedf0c2b8d249a8351c726e736

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5f0b4b953baa6971603448e3b85b5669e85a6dfebbe7c0cbcecc8f3f244f375a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.AP",
    "submitted_at": "2018-03-31T16:32:31Z",
    "title_canon_sha256": "79d26b0706a637913cfd38d8359cb2af66487e3e6484ae0f477dc594aa17c94b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.00191",
    "kind": "arxiv",
    "version": 1
  }
}