Pith Number

pith:TTQLDT26

pith:2018:TTQLDT26T26A5237XRDTMXJMTA

not attested not anchored not stored refs pending

Sparse, Collaborative, or Nonnegative Representation: Which Helps Pattern Classification?

David Zhang, Jun Xu, Lei Zhang, Wangpeng An

arxiv:1806.04329 v2 · 2018-06-12 · 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{TTQLDT26T26A5237XRDTMXJMTA}

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	2026-05-17T23:59:01.718223Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9ce0b1cf5e9ebc0eeb7fbc47365d2c981654ba8f1408b3b6febefaad293becb0

Aliases

arxiv: 1806.04329 · arxiv_version: 1806.04329v2 · doi: 10.48550/arxiv.1806.04329 · pith_short_12: TTQLDT26T26A · pith_short_16: TTQLDT26T26A5237 · pith_short_8: TTQLDT26

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/TTQLDT26T26A5237XRDTMXJMTA \
  | 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: 9ce0b1cf5e9ebc0eeb7fbc47365d2c981654ba8f1408b3b6febefaad293becb0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a60af2005191df4e6560fa6dbe83860fa9a2e1b51462f4cfe706a848ce2662d4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2018-06-12T04:38:40Z",
    "title_canon_sha256": "0d54908ee79f70bbbab4584b7cd6a7bad75966b900010e3eb8c7752df2788e09"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.04329",
    "kind": "arxiv",
    "version": 2
  }
}