Pith Number

pith:HDM72KUE

pith:2019:HDM72KUEJBQTDOV3OGQNVPC4HB

not attested not anchored not stored refs pending

Deep Learning without Weight Transport

Collin Wilson, Douglas Tweed, Mohamed Akrout, Peter C. Humphreys, Timothy Lillicrap

arxiv:1904.05391 v5 · 2019-04-10 · cs.LG · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HDM72KUEJBQTDOV3OGQNVPC4HB}

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	2026-07-05T00:32:37.802777Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

38d9fd2a84486131babb71a0dabc5c385f10520472b2850f579c6ade961af8d8

Aliases

arxiv: 1904.05391 · arxiv_version: 1904.05391v5 · doi: 10.48550/arxiv.1904.05391 · pith_short_12: HDM72KUEJBQT · pith_short_16: HDM72KUEJBQTDOV3 · pith_short_8: HDM72KUE

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/HDM72KUEJBQTDOV3OGQNVPC4HB \
  | 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: 38d9fd2a84486131babb71a0dabc5c385f10520472b2850f579c6ade961af8d8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a6a5ec43d4b851bd526660f6f4076abdb773789bc9d9706273708cb657f1c0e0",
    "cross_cats_sorted": [
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2019-04-10T18:55:59Z",
    "title_canon_sha256": "ed84352fa21bf71e75dfcbd249bfc4fb34349a6752e123b488d05499496fb664"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.05391",
    "kind": "arxiv",
    "version": 5
  }
}