Pith Number

pith:WGGT7NKJ

pith:2017:WGGT7NKJPM25X4OERB33CQRSVN

not attested not anchored not stored refs pending

Robust Sparse Coding via Self-Paced Learning

Sen Wu, Xiaodong Feng, Zhiwei Tang

arxiv:1709.03030 v1 · 2017-09-10 · cs.LG · 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{WGGT7NKJPM25X4OERB33CQRSVN}

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	2026-05-18T00:35:39.634546Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b18d3fb5497b35dbf1c48877b14232ab4210d8b94646eb5fc940e21097e0a25e

Aliases

arxiv: 1709.03030 · arxiv_version: 1709.03030v1 · doi: 10.48550/arxiv.1709.03030 · pith_short_12: WGGT7NKJPM25 · pith_short_16: WGGT7NKJPM25X4OE · pith_short_8: WGGT7NKJ

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/WGGT7NKJPM25X4OERB33CQRSVN \
  | 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: b18d3fb5497b35dbf1c48877b14232ab4210d8b94646eb5fc940e21097e0a25e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3f2a2553902fe2128030129b04dc77c797c22e186537b76f9b15fd36fbabf588",
    "cross_cats_sorted": [
      "cs.CV"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2017-09-10T03:15:48Z",
    "title_canon_sha256": "dede945d78595ddb4f3fe9b879fb1ce8c3471be1470eda6c97da8ecb415d0cd1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.03030",
    "kind": "arxiv",
    "version": 1
  }
}