Pith Number

pith:F5GQSHJC

pith:2016:F5GQSHJCLSEGQ5MNCVHIFRPMHA

not attested not anchored not stored refs pending

Adaptive test for large covariance matrices with missing observations

Cristina Butucea, Rania Zgheib

arxiv:1602.04310 v1 · 2016-02-13 · 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{F5GQSHJCLSEGQ5MNCVHIFRPMHA}

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	2026-05-18T01:20:51.278778Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2f4d091d225c8868758d154e82c5ec381484ac6dcf6fe13a2fb6c48469ed1b2e

Aliases

arxiv: 1602.04310 · arxiv_version: 1602.04310v1 · doi: 10.48550/arxiv.1602.04310 · pith_short_12: F5GQSHJCLSEG · pith_short_16: F5GQSHJCLSEGQ5MN · pith_short_8: F5GQSHJC

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/F5GQSHJCLSEGQ5MNCVHIFRPMHA \
  | 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: 2f4d091d225c8868758d154e82c5ec381484ac6dcf6fe13a2fb6c48469ed1b2e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "50da4eed0f310c548e2789e8ac157addcaf13e1a8ed0a8c3ec7111d19503516b",
    "cross_cats_sorted": [
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.ST",
    "submitted_at": "2016-02-13T10:08:01Z",
    "title_canon_sha256": "56ea4c0d80809fdbb7dab31c6b0037ff5d72584c5dd853826d51171b40dc3eec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.04310",
    "kind": "arxiv",
    "version": 1
  }
}