Pith Number

pith:UOZQSHPT

pith:2011:UOZQSHPTYR4SPZ4HSAPVA7GNSB

not attested not anchored not stored refs pending

Mean--variance portfolio optimization when means and covariances are unknown

Haipeng Xing, Tze Leung Lai, Zehao Chen

arxiv:1108.0996 v1 · 2011-08-04 · stat.AP · 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{UOZQSHPTYR4SPZ4HSAPVA7GNSB}

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	2026-05-18T04:16:13.241605Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3b3091df3c47927e787901f507ccd90573bf64060be3c7ba7a7b4d325dce5e0

Aliases

arxiv: 1108.0996 · arxiv_version: 1108.0996v1 · doi: 10.48550/arxiv.1108.0996 · pith_short_12: UOZQSHPTYR4S · pith_short_16: UOZQSHPTYR4SPZ4H · pith_short_8: UOZQSHPT

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/UOZQSHPTYR4SPZ4HSAPVA7GNSB \
  | 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: a3b3091df3c47927e787901f507ccd90573bf64060be3c7ba7a7b4d325dce5e0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8a24ae84d6952925e65b64e2ba882d29cbc50a4cf191998c58eb811a89cafd47",
    "cross_cats_sorted": [
      "q-fin.PM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.AP",
    "submitted_at": "2011-08-04T05:42:08Z",
    "title_canon_sha256": "ad169e2c4889b3da4b856588517458f9429670a5982adb6a6a763123062762d0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1108.0996",
    "kind": "arxiv",
    "version": 1
  }
}