Pith Number

pith:K34TEJJE

pith:2018:K34TEJJEXP727QFWINVXO7AI45

not attested not anchored not stored refs pending

Diversity and Sparsity: A New Perspective on Index Tracking

Timothy M. Hospedales, Yongxin Yang, Yu Zheng

arxiv:1809.01989 v2 · 2018-09-06 · 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{K34TEJJEXP727QFWINVXO7AI45}

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	2026-07-05T00:37:43.169942Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

56f9322524bbffafc0b6436b777c08e74aab8867dc10a7d71e1c971daca92645

Aliases

arxiv: 1809.01989 · arxiv_version: 1809.01989v2 · doi: 10.48550/arxiv.1809.01989 · pith_short_12: K34TEJJEXP72 · pith_short_16: K34TEJJEXP727QFW · pith_short_8: K34TEJJE

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/K34TEJJEXP727QFWINVXO7AI45 \
  | 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: 56f9322524bbffafc0b6436b777c08e74aab8867dc10a7d71e1c971daca92645

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c98d5deb0434ca0e90ca9f945f8dc6a7ff955eb75bdd865da64c5f8561110ba1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-fin.PM",
    "submitted_at": "2018-09-06T13:43:18Z",
    "title_canon_sha256": "0fcc512dddb0012b4993453291c804626128ce78c55f58fb020e8e824d8cb32f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.01989",
    "kind": "arxiv",
    "version": 2
  }
}