Pith Number

pith:BCDMM5DB

pith:2019:BCDMM5DBBMJS6CEEWBLUDXM5OR

not attested not anchored not stored refs pending

Improving Facial Emotion Recognition Systems Using Gradient and Laplacian Images

A G Ramakrishnan, Nabagata Saha, Ram Krishna Pandey, Souvik Karmakar

arxiv:1902.05411 v1 · 2019-02-12 · cs.CV · cs.LG · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BCDMM5DBBMJS6CEEWBLUDXM5OR}

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	2026-05-17T23:54:00.900350Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0886c674610b132f0884b05741dd9d746eedddc4257e7ad61aa221f8da6a2ac0

Aliases

arxiv: 1902.05411 · arxiv_version: 1902.05411v1 · doi: 10.48550/arxiv.1902.05411 · pith_short_12: BCDMM5DBBMJS · pith_short_16: BCDMM5DBBMJS6CEE · pith_short_8: BCDMM5DB

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/BCDMM5DBBMJS6CEEWBLUDXM5OR \
  | 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: 0886c674610b132f0884b05741dd9d746eedddc4257e7ad61aa221f8da6a2ac0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6800346fa6d508e316938d2574ad049e5b00e30ef5a84e8b6a314aea0fffb852",
    "cross_cats_sorted": [
      "cs.LG",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2019-02-12T10:00:34Z",
    "title_canon_sha256": "83b5015ec557c60295f8af4aea5dbb729b62b319595a8b56f7a303f61dae1649"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.05411",
    "kind": "arxiv",
    "version": 1
  }
}