Pith Number

pith:5WURPFG4

pith:2018:5WURPFG4WNL4UFBIPFFWC7VI3O

not attested not anchored not stored refs pending

Deep Covariance Descriptors for Facial Expression Recognition

Anis Kacem, Lahoucine Ballihi, Mohamed Daoudi, Naima Otberdout, Stefano Berretti

arxiv:1805.03869 v1 · 2018-05-10 · 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{5WURPFG4WNL4UFBIPFFWC7VI3O}

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	2026-05-18T00:16:16.520626Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eda91794dcb357ca1428794b617ea8dba5b0fa739ae53e4b70fae33deac44123

Aliases

arxiv: 1805.03869 · arxiv_version: 1805.03869v1 · doi: 10.48550/arxiv.1805.03869 · pith_short_12: 5WURPFG4WNL4 · pith_short_16: 5WURPFG4WNL4UFBI · pith_short_8: 5WURPFG4

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/5WURPFG4WNL4UFBIPFFWC7VI3O \
  | 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: eda91794dcb357ca1428794b617ea8dba5b0fa739ae53e4b70fae33deac44123

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "741b65b1ad4313c117b2594b067908682651d2a584c89f5c37fdff993e65d4f4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2018-05-10T07:53:26Z",
    "title_canon_sha256": "be1b7825ebed94b025c69f96555a6a369a28428603e6b76161117550b1dde480"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.03869",
    "kind": "arxiv",
    "version": 1
  }
}