Pith Number

pith:VRL5X4CJ

pith:2018:VRL5X4CJ5ULM6B4BW2TP5KSWZE

not attested not anchored not stored refs pending

Learning sparse transformations through backpropagation

Peter Bloem

arxiv:1810.09184 v1 · 2018-10-22 · stat.ML · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VRL5X4CJ5ULM6B4BW2TP5KSWZE}

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	2026-05-18T00:02:40.842528Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac57dbf049ed16cf0781b6a6feaa56c93131f17e98c9956d51b16033efef7c35

Aliases

arxiv: 1810.09184 · arxiv_version: 1810.09184v1 · doi: 10.48550/arxiv.1810.09184 · pith_short_12: VRL5X4CJ5ULM · pith_short_16: VRL5X4CJ5ULM6B4B · pith_short_8: VRL5X4CJ

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/VRL5X4CJ5ULM6B4BW2TP5KSWZE \
  | 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: ac57dbf049ed16cf0781b6a6feaa56c93131f17e98c9956d51b16033efef7c35

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4245ffda447cac49c6856a49f0a685677ec7c2ae689145a0c2f640ad34efaa75",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2018-10-22T11:34:32Z",
    "title_canon_sha256": "d86d793af925f6dee094a9895cab666c8fed0bd03e4ed57266779f7986e12028"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.09184",
    "kind": "arxiv",
    "version": 1
  }
}