Pith Number

pith:U5PETYCO

pith:2017:U5PETYCOFOGAQ5D3B5WM7BXWIG

not attested not anchored not stored refs pending

Vision Recognition using Discriminant Sparse Optimization Learning

Qingxiang Feng, Yicong Zhou

arxiv:1712.01645 v1 · 2017-11-19 · 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{U5PETYCOFOGAQ5D3B5WM7BXWIG}

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	2026-05-18T00:28:48.039674Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a75e49e04e2b8c08747b0f6ccf86f64186d0cba7c64f3bb3e7e5bf9918d984da

Aliases

arxiv: 1712.01645 · arxiv_version: 1712.01645v1 · doi: 10.48550/arxiv.1712.01645 · pith_short_12: U5PETYCOFOGA · pith_short_16: U5PETYCOFOGAQ5D3 · pith_short_8: U5PETYCO

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/U5PETYCOFOGAQ5D3B5WM7BXWIG \
  | 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: a75e49e04e2b8c08747b0f6ccf86f64186d0cba7c64f3bb3e7e5bf9918d984da

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bfbee9769d75125d0609bc9dbed15698f80037b4c14dcd21ede1d59d3af0348d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2017-11-19T13:39:49Z",
    "title_canon_sha256": "6fe2dd58b9a2cac0d8041fde464f1485e4c75da5653573f9450f529601f3d3c1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1712.01645",
    "kind": "arxiv",
    "version": 1
  }
}