Pith Number

pith:QFCGWGGB

pith:2018:QFCGWGGBQXF64QUIUZLEHU3AJO

not attested not anchored not stored refs pending

Efficient Dictionary Learning with Gradient Descent

Dar Gilboa, John Wright, Sam Buchanan

arxiv:1809.10313 v1 · 2018-09-27 · math.OC

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QFCGWGGBQXF64QUIUZLEHU3AJO}

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	2026-05-18T00:04:38.616066Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

81446b18c185cbee4288a65643d3604bbbb92935d7f1b687268b4d853b403475

Aliases

arxiv: 1809.10313 · arxiv_version: 1809.10313v1 · doi: 10.48550/arxiv.1809.10313 · pith_short_12: QFCGWGGBQXF6 · pith_short_16: QFCGWGGBQXF64QUI · pith_short_8: QFCGWGGB

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/QFCGWGGBQXF64QUIUZLEHU3AJO \
  | 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: 81446b18c185cbee4288a65643d3604bbbb92935d7f1b687268b4d853b403475

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "33f494aa554f23d9d1b2b97263b508fe4c0c3745b95b65806650e5295cfebd85",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2018-09-27T02:14:40Z",
    "title_canon_sha256": "cbe3a34d4d4bdf656f76bc5104189570aafe4cb786477fa03ee3fd46b095dfbf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.10313",
    "kind": "arxiv",
    "version": 1
  }
}