Pith Number

pith:K6EAMOT5

pith:2012:K6EAMOT52A4J4FAGK5BBMCJSLP

not attested not anchored not stored refs pending

Robust Estimates of Covariance Matrices in the Large Dimensional Regime

Frederic Pascal, Jack W. Silverstein, Romain Couillet

arxiv:1204.5320 v4 · 2012-04-24 · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{K6EAMOT52A4J4FAGK5BBMCJSLP}

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	2026-05-18T00:57:56.965183Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5788063a7dd0389e140657421609325be15f15f0b5f77674c26fd81d08542533

Aliases

arxiv: 1204.5320 · arxiv_version: 1204.5320v4 · doi: 10.48550/arxiv.1204.5320 · pith_short_12: K6EAMOT52A4J · pith_short_16: K6EAMOT52A4J4FAG · pith_short_8: K6EAMOT5

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/K6EAMOT52A4J4FAGK5BBMCJSLP \
  | 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: 5788063a7dd0389e140657421609325be15f15f0b5f77674c26fd81d08542533

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4f50d0549e821935a928ae27f8477bbcfee77521cdf38421b2a9611c7e1cd2e0",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2012-04-24T09:51:23Z",
    "title_canon_sha256": "ee87a90768c65db2ea5226c93df53d02de32d2c425a2ef52aee631d67c27dacd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.5320",
    "kind": "arxiv",
    "version": 4
  }
}