Pith Number

pith:JQA2N4PP

pith:2019:JQA2N4PPOTATXBNHTNTCL5UME2

not attested not anchored not stored refs pending

Avoiding Backtesting Overfitting by Covariance-Penalties: an empirical investigation of the ordinary and total least squares cases

Adriano Koshiyama, Nick Firoozye

arxiv:1905.05023 v1 · 2019-05-01 · q-fin.PM · q-fin.RM · q-fin.TR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JQA2N4PPOTATXBNHTNTCL5UME2}

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	2026-05-17T23:46:22.760013Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4c01a6f1ef74c13b85a79b6625f68c2693bdbf7f35afe4597abfe81d969a7fbf

Aliases

arxiv: 1905.05023 · arxiv_version: 1905.05023v1 · doi: 10.48550/arxiv.1905.05023 · pith_short_12: JQA2N4PPOTAT · pith_short_16: JQA2N4PPOTATXBNH · pith_short_8: JQA2N4PP

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/JQA2N4PPOTATXBNHTNTCL5UME2 \
  | 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: 4c01a6f1ef74c13b85a79b6625f68c2693bdbf7f35afe4597abfe81d969a7fbf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8f2fd9a788a752bfb063e545496a6b8beeeab7fb8f477263a1b5517b33d4541c",
    "cross_cats_sorted": [
      "q-fin.RM",
      "q-fin.TR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-fin.PM",
    "submitted_at": "2019-05-01T08:39:50Z",
    "title_canon_sha256": "3d531a42433ad9654dd209530d42f12564f673d1f2545aaa3dc2687cbf96b17f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.05023",
    "kind": "arxiv",
    "version": 1
  }
}