Pith Number

pith:6HDG556L

pith:2014:6HDG556LZJEOX7HFN6NZR6HTM6

not attested not anchored not stored refs pending

Approximation of eigenvalues of spot cross volatility matrix with a view toward principal component analysis

Hoang-Long Ngo, Nien-Lin Liu

arxiv:1409.2214 v1 · 2014-09-08 · q-fin.ST

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6HDG556LZJEOX7HFN6NZR6HTM6}

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	2026-05-18T02:43:17.601360Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f1c66ef7cbca48ebfce56f9b98f8f36798c4344c24c13cc27ae87bc23ded324b

Aliases

arxiv: 1409.2214 · arxiv_version: 1409.2214v1 · doi: 10.48550/arxiv.1409.2214 · pith_short_12: 6HDG556LZJEO · pith_short_16: 6HDG556LZJEOX7HF · pith_short_8: 6HDG556L

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/6HDG556LZJEOX7HFN6NZR6HTM6 \
  | 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: f1c66ef7cbca48ebfce56f9b98f8f36798c4344c24c13cc27ae87bc23ded324b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "469ce95386e3c7d39cba7325434cff32be48e998de3b6ea4294a918f39f69ada",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-fin.ST",
    "submitted_at": "2014-09-08T06:04:23Z",
    "title_canon_sha256": "edab19c662c4e37cb54045888e4e994fa2868fd42db03949c3c9f0a877b08bfe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1409.2214",
    "kind": "arxiv",
    "version": 1
  }
}