Pith Number

pith:7MDUN6W7

pith:2011:7MDUN6W75YBMITRM6TBVOO5UG3

not attested not anchored not stored refs pending

Geometric methods for estimation of structured covariances

Lipeng Ning, Tryphon Georgiou, Xianhua Jiang

arxiv:1110.3695 v1 · 2011-10-17 · math.OC · cs.SY · 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{7MDUN6W75YBMITRM6TBVOO5UG3}

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	2026-05-18T04:10:48.690169Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fb0746fadfee02c44e2cf4c3573bb436e8d7e0e82651044cb02c57a97728c9d5

Aliases

arxiv: 1110.3695 · arxiv_version: 1110.3695v1 · doi: 10.48550/arxiv.1110.3695 · pith_short_12: 7MDUN6W75YBM · pith_short_16: 7MDUN6W75YBMITRM · pith_short_8: 7MDUN6W7

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/7MDUN6W75YBMITRM6TBVOO5UG3 \
  | 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: fb0746fadfee02c44e2cf4c3573bb436e8d7e0e82651044cb02c57a97728c9d5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c8fd13866d5b7f827c243970d12062686cb0cd25171b94dd001e445e9e76bdb5",
    "cross_cats_sorted": [
      "cs.SY",
      "math.ST",
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2011-10-17T15:21:15Z",
    "title_canon_sha256": "ef93753fb1de34437480927a6983d087fb91f35e0497921683f4e748354170b4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1110.3695",
    "kind": "arxiv",
    "version": 1
  }
}