Pith Number

pith:2TCV25IE

pith:2018:2TCV25IEJGDWWXBJU4LFAG3KVP

not attested not anchored not stored refs pending

On the role of ML estimation and Bregman divergences in sparse representation of covariance and precision matrices

Branko Brklja\v{c}, \v{Z}eljen Trpovski

arxiv:1810.11718 v1 · 2018-10-27 · cs.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2TCV25IEJGDWWXBJU4LFAG3KVP}

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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	2026-05-18T00:02:07.650145Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d4c55d750449876b5c29a716501b6aabdb329bdfd4e0d95a8e2aba3c4d913348

Aliases

arxiv: 1810.11718 · arxiv_version: 1810.11718v1 · doi: 10.48550/arxiv.1810.11718 · pith_short_12: 2TCV25IEJGDW · pith_short_16: 2TCV25IEJGDWWXBJ · pith_short_8: 2TCV25IE

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/2TCV25IEJGDWWXBJU4LFAG3KVP \
  | 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: d4c55d750449876b5c29a716501b6aabdb329bdfd4e0d95a8e2aba3c4d913348

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8728bc5aa3d1ac8e9bb4a11e556f030081e7e5614c501366de8b8cb2abe97eb2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2018-10-27T22:06:29Z",
    "title_canon_sha256": "2c2cafb9a723bcebbe5b3c0bfdb9c29334f4478d9f816049faca31042f62e679"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.11718",
    "kind": "arxiv",
    "version": 1
  }
}