Pith Number

pith:FOUHQ4KM

pith:2012:FOUHQ4KM5Z2UAHLYI7D7AGWNXM

not attested not anchored not stored refs pending

Optimal hypothesis testing for high dimensional covariance matrices

T. Tony Cai, Zongming Ma

arxiv:1205.4219 v2 · 2012-05-18 · math.ST · stat.TH

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FOUHQ4KM5Z2UAHLYI7D7AGWNXM}

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	2026-05-18T03:04:24.365943Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2ba878714cee75401d7847c7f01acdbb2602de8c8e49fcebc1dd85d0181fb444

Aliases

arxiv: 1205.4219 · arxiv_version: 1205.4219v2 · doi: 10.48550/arxiv.1205.4219 · pith_short_12: FOUHQ4KM5Z2U · pith_short_16: FOUHQ4KM5Z2UAHLY · pith_short_8: FOUHQ4KM

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/FOUHQ4KM5Z2UAHLYI7D7AGWNXM \
  | 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: 2ba878714cee75401d7847c7f01acdbb2602de8c8e49fcebc1dd85d0181fb444

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6ac7f23c148f27382a5ba8d3fb9fe283bcc3c4586ac4453681336fea24fec2ac",
    "cross_cats_sorted": [
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.ST",
    "submitted_at": "2012-05-18T19:06:15Z",
    "title_canon_sha256": "03b42b14ca98a1e01bb805d8923a59e1f47efe6358c02eea1f9d0ece10b2a4bd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.4219",
    "kind": "arxiv",
    "version": 2
  }
}