Pith Number

pith:ZDMOA2IH

pith:2013:ZDMOA2IHXY22HVFYYK6S2UD24S

not attested not anchored not stored refs pending

Estimation of the population spectral distribution from a large dimensional sample covariance matrix

Jianfeng Yao, Jiaqi Chen, Weiming Li, Yingli Qin, Zhidong Bai

arxiv:1302.0355 v1 · 2013-02-02 · stat.ME

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZDMOA2IHXY22HVFYYK6S2UD24S}

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	2026-05-18T03:34:37.389045Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c8d8e06907be35a3d4b8c2bd2d507ae48237fd3dd224c9df222867c55fe89bbc

Aliases

arxiv: 1302.0355 · arxiv_version: 1302.0355v1 · doi: 10.48550/arxiv.1302.0355 · pith_short_12: ZDMOA2IHXY22 · pith_short_16: ZDMOA2IHXY22HVFY · pith_short_8: ZDMOA2IH

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/ZDMOA2IHXY22HVFYYK6S2UD24S \
  | 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: c8d8e06907be35a3d4b8c2bd2d507ae48237fd3dd224c9df222867c55fe89bbc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "32ea22cc7bf83e945817d2685403777a150834d772a93d08a13fd4384dd03b1f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2013-02-02T08:51:50Z",
    "title_canon_sha256": "3a6466f335cac003814f82b28ccdbfcaec87e844dcd4de94fa3999a52dc4cb45"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.0355",
    "kind": "arxiv",
    "version": 1
  }
}