Pith Number

pith:D7OLBSSW

pith:2013:D7OLBSSWS3WTDFKMWV3K45XHST

not attested not anchored not stored refs pending

Sparse Portfolio Selection via Quasi-Norm Regularization

Caihua Chen, Caleb Tolman, Suyang Wang, Xindan Li, Yinyu Ye

arxiv:1312.6350 v1 · 2013-12-22 · q-fin.PM · math.OC

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Add to your LaTeX paper

\usepackage{pith}
\pithnumber{D7OLBSSWS3WTDFKMWV3K45XHST}

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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

Decision-focused Sparse Tangent Portfolio Optimization

Receipt and verification

First computed	2026-05-18T03:03:58.518922Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1fdcb0ca5696ed31954cb576ae76e794ec2ef21699281af3df4d11ecd9fcdde7

Aliases

arxiv: 1312.6350 · arxiv_version: 1312.6350v1 · doi: 10.48550/arxiv.1312.6350 · pith_short_12: D7OLBSSWS3WT · pith_short_16: D7OLBSSWS3WTDFKM · pith_short_8: D7OLBSSW

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/D7OLBSSWS3WTDFKMWV3K45XHST \
  | 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: 1fdcb0ca5696ed31954cb576ae76e794ec2ef21699281af3df4d11ecd9fcdde7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "60889171c70739c526db305e215b36f201413be284f8a3a8edfbe6498d401af4",
    "cross_cats_sorted": [
      "math.OC"
    ],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "q-fin.PM",
    "submitted_at": "2013-12-22T07:07:36Z",
    "title_canon_sha256": "1fc49fe1f3c5a7b4d6d3adbef65aa80d5cda465abbea4966b8d495752fc1dc93"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.6350",
    "kind": "arxiv",
    "version": 1
  }
}