Pith Number

pith:NLINHN4H

pith:2011:NLINHN4H3VYFUU6KFWFRSDOSLX

not attested not anchored not stored refs pending

Feature selection via simultaneous sparse approximation for person specific face verification

Beiji Zou, Lei Wang, Shenghui Liao, Yixiong Liang

arxiv:1102.2743 v2 · 2011-02-14 · 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{NLINHN4H3VYFUU6KFWFRSDOSLX}

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	2026-05-18T04:22:41.197998Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6ad0d3b787dd705a53ca2d8b190dd25dc52fe3523b42d0f110bd3e1300f98446

Aliases

arxiv: 1102.2743 · arxiv_version: 1102.2743v2 · doi: 10.48550/arxiv.1102.2743 · pith_short_12: NLINHN4H3VYF · pith_short_16: NLINHN4H3VYFUU6K · pith_short_8: NLINHN4H

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/NLINHN4H3VYFUU6KFWFRSDOSLX \
  | 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: 6ad0d3b787dd705a53ca2d8b190dd25dc52fe3523b42d0f110bd3e1300f98446

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "48b6fa428596cb48ce403b82fecb1e3b51e32c3af0e8e3055076919be82c9e08",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2011-02-14T11:51:35Z",
    "title_canon_sha256": "c7a34083b763c39940d0fa3f816085075b2f82d09b61c6a9c9149c8910c75f95"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.2743",
    "kind": "arxiv",
    "version": 2
  }
}