Pith Number

pith:7EEEQ4AJ

pith:2026:7EEEQ4AJ47A23LLWC7TMTY37MG

not attested not anchored not stored refs pending

The Decision Geometry of Covariance Estimation for the Global Minimum-Variance Portfolio under Heavy Tails

Xavier Fonseca

arxiv:2606.27462 v1 · 2026-06-25 · stat.ML · cs.LG · q-fin.PM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7EEEQ4AJ47A23LLWC7TMTY37MG}

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	2026-06-29T00:14:06.973017Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f908487009e7c1adad7617e6c9e37f618e78322831a3cec6fab8807ffa41a622

Aliases

arxiv: 2606.27462 · arxiv_version: 2606.27462v1 · doi: 10.48550/arxiv.2606.27462 · pith_short_12: 7EEEQ4AJ47A2 · pith_short_16: 7EEEQ4AJ47A23LLW · pith_short_8: 7EEEQ4AJ

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/7EEEQ4AJ47A23LLWC7TMTY37MG \
  | 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: f908487009e7c1adad7617e6c9e37f618e78322831a3cec6fab8807ffa41a622

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8cd02a7126fdaa60d0a43ced489b9ac592128f446e188f4d2453c88b7772cc12",
    "cross_cats_sorted": [
      "cs.LG",
      "q-fin.PM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2026-06-25T18:35:30Z",
    "title_canon_sha256": "ac9d3a51a3d037a9d818def8905ea29143bf5662253e10e3b7162083e5a4d8ca"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.27462",
    "kind": "arxiv",
    "version": 1
  }
}