Pith Number

pith:2MW5LL6A

pith:2015:2MW5LL6ARM5Z7GF5Z5GCYDRXAQ

not attested not anchored not stored refs pending

Supervised learning of sparse context reconstruction coefficients for data representation and classification

Benjamin Edwards, Jingbin Wang, Ming Yin, Peijuan Xu, Xuejie Liu

arxiv:1508.04221 v1 · 2015-08-18 · 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{2MW5LL6ARM5Z7GF5Z5GCYDRXAQ}

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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	2026-05-18T01:35:05.935984Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d32dd5afc08b3b9f98bdcf4c2c0e37040fa647b0d3be26f0b05ebc000d288ce3

Aliases

arxiv: 1508.04221 · arxiv_version: 1508.04221v1 · doi: 10.48550/arxiv.1508.04221 · pith_short_12: 2MW5LL6ARM5Z · pith_short_16: 2MW5LL6ARM5Z7GF5 · pith_short_8: 2MW5LL6A

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/2MW5LL6ARM5Z7GF5Z5GCYDRXAQ \
  | 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: d32dd5afc08b3b9f98bdcf4c2c0e37040fa647b0d3be26f0b05ebc000d288ce3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4907892428d980870cc3f02a45d05b4aad05732c500bc6078979e467d558d0b6",
    "cross_cats_sorted": [
      "cs.CV"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2015-08-18T05:59:17Z",
    "title_canon_sha256": "102d1d385bdad35bf5433ba615be054419b4877139feafa91ce4ffcd06b849a3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.04221",
    "kind": "arxiv",
    "version": 1
  }
}