Pith Number

pith:QZL7ETDZ

pith:2019:QZL7ETDZ52IT7WBLDOQMYIHWCV

not attested not anchored not stored refs pending

Precision Matrix Estimation with Noisy and Missing Data

Byoungwook Jang, Roger Fan, Shuheng Zhou, Yuekai Sun

arxiv:1904.03548 v1 · 2019-04-07 · stat.ML · cs.LG · 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{QZL7ETDZ52IT7WBLDOQMYIHWCV}

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	2026-05-17T23:49:13.029629Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8657f24c79ee913fd82b1ba0cc20f61560af12d48d299998a5ee82fd9b1e303c

Aliases

arxiv: 1904.03548 · arxiv_version: 1904.03548v1 · doi: 10.48550/arxiv.1904.03548 · pith_short_12: QZL7ETDZ52IT · pith_short_16: QZL7ETDZ52IT7WBL · pith_short_8: QZL7ETDZ

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/QZL7ETDZ52IT7WBLDOQMYIHWCV \
  | 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: 8657f24c79ee913fd82b1ba0cc20f61560af12d48d299998a5ee82fd9b1e303c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e28965851d7dc3194fb313bc49e262daf1d2549eb9aaaaa87f5af1ed4088652a",
    "cross_cats_sorted": [
      "cs.LG",
      "stat.ME"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2019-04-07T00:05:57Z",
    "title_canon_sha256": "4b68f98ba334dc92fd40957980d2f1f7e52cdc22cf750c4649d57d5f9debcc0f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.03548",
    "kind": "arxiv",
    "version": 1
  }
}