Pith Number

pith:WCD3EY36

pith:2018:WCD3EY36RQBRSRFGMKPDJT6P5U

not attested not anchored not stored refs pending

A New Backpropagation Algorithm without Gradient Descent

S. Natarajan, Varun Ranganathan

arxiv:1802.00027 v1 · 2018-01-25 · 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{WCD3EY36RQBRSRFGMKPDJT6P5U}

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	2026-05-18T00:24:36.968155Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b087b2637e8c031944a6629e34cfcfed17129f5b57c3a147fe67901545049c37

Aliases

arxiv: 1802.00027 · arxiv_version: 1802.00027v1 · doi: 10.48550/arxiv.1802.00027 · pith_short_12: WCD3EY36RQBR · pith_short_16: WCD3EY36RQBRSRFG · pith_short_8: WCD3EY36

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/WCD3EY36RQBRSRFGMKPDJT6P5U \
  | 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: b087b2637e8c031944a6629e34cfcfed17129f5b57c3a147fe67901545049c37

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "31974caf1c7271b64b153914ed388f2c718f72e181a31f37bb9a5118e94e0f1e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2018-01-25T05:33:26Z",
    "title_canon_sha256": "c80c9c85a6dd393a21aba0098d6207b91a3f3d9d4f7110fa00b7cdbde6f86e46"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.00027",
    "kind": "arxiv",
    "version": 1
  }
}