Pith Number

pith:MCCHESOG

pith:2009:MCCHESOGVCC7LB6VIQUYZFKTMV

not attested not anchored not stored refs pending

Regularizing Portfolio Optimization

Imre Kondor, Susanne Still

arxiv:0911.1694 v1 · 2009-11-09 · q-fin.PM · q-fin.RM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MCCHESOGVCC7LB6VIQUYZFKTMV}

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	2026-05-18T02:10:49.597325Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

60847249c6a885f587d544298c9553654b9c4c11b75343188cff2d9e8e7a8648

Aliases

arxiv: 0911.1694 · arxiv_version: 0911.1694v1 · doi: 10.48550/arxiv.0911.1694 · pith_short_12: MCCHESOGVCC7 · pith_short_16: MCCHESOGVCC7LB6V · pith_short_8: MCCHESOG

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/MCCHESOGVCC7LB6VIQUYZFKTMV \
  | 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: 60847249c6a885f587d544298c9553654b9c4c11b75343188cff2d9e8e7a8648

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fb6d4c95a7d4a7e4cc4d8010e8f932ead33e8695303b77f097dabc6d472bbab6",
    "cross_cats_sorted": [
      "q-fin.RM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-fin.PM",
    "submitted_at": "2009-11-09T15:16:27Z",
    "title_canon_sha256": "3fe80956ee3f003575718a8c3f0806f2f63e999e8cc1a06d1db56312924064c6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.1694",
    "kind": "arxiv",
    "version": 1
  }
}