Pith Number

pith:DFUT5FBF

pith:2021:DFUT5FBFNVDHGFELPDJY7ELTYH

not attested not anchored not stored refs pending

FocusFace: Multi-task Contrastive Learning for Masked Face Recognition

Ana F. Sequeira, Fadi Boutros, Jaime S. Cardoso, Jo\~ao Ribeiro Pinto, Naser Damer, Pedro C. Neto

arxiv:2110.14940 v2 · 2021-10-28 · cs.CV · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DFUT5FBFNVDHGFELPDJY7ELTYH}

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	2026-07-05T03:27:59.343861Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

19693e94256d4673148b78d38f9173c1ca9c773a247b0888adb26b6203e1e88d

Aliases

arxiv: 2110.14940 · arxiv_version: 2110.14940v2 · doi: 10.48550/arxiv.2110.14940 · pith_short_12: DFUT5FBFNVDH · pith_short_16: DFUT5FBFNVDHGFEL · pith_short_8: DFUT5FBF

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/DFUT5FBFNVDHGFELPDJY7ELTYH \
  | 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: 19693e94256d4673148b78d38f9173c1ca9c773a247b0888adb26b6203e1e88d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "458732fa4daff0067d89bc324e9d0467e715e5076d11642c74fde69443f88ecf",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2021-10-28T08:17:12Z",
    "title_canon_sha256": "a465d9597fe475517245fb616369adf429ba41d9df41016faad76a179d1238cf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2110.14940",
    "kind": "arxiv",
    "version": 2
  }
}