Pith Number

pith:OP2WEOUN

pith:2019:OP2WEOUN6FZRPMHAHOSSDJLBDK

not attested not anchored not stored refs pending

Sparse Coding of Shape Trajectories for Facial Expression and Action Recognition

Amor Ben Tanfous, Boulbaba Ben Amor, Hassen Drira

arxiv:1908.03231 v1 · 2019-08-08 · 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{OP2WEOUN6FZRPMHAHOSSDJLBDK}

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	2026-07-04T23:52:37.575801Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

73f5623a8df17317b0e03ba521a5611a9103d3420161c61bee073e0fc8476439

Aliases

arxiv: 1908.03231 · arxiv_version: 1908.03231v1 · doi: 10.48550/arxiv.1908.03231 · pith_short_12: OP2WEOUN6FZR · pith_short_16: OP2WEOUN6FZRPMHA · pith_short_8: OP2WEOUN

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/OP2WEOUN6FZRPMHAHOSSDJLBDK \
  | 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: 73f5623a8df17317b0e03ba521a5611a9103d3420161c61bee073e0fc8476439

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "426a6c155a404b21fdfc4c26f18567422ffdf2682ca4dc814e379e92924f55b2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2019-08-08T18:16:37Z",
    "title_canon_sha256": "bf30607fd4265a1e3ea414c678b9c54fbd45df8e4da2a2bcdbcaae773cb94400"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.03231",
    "kind": "arxiv",
    "version": 1
  }
}