Pith Number

pith:IOGE7UYW

pith:2015:IOGE7UYWQ2EMAHX4NJIYFBRGGU

not attested not anchored not stored refs pending

How Important is Weight Symmetry in Backpropagation?

Joel Z. Leibo, Qianli Liao, Tomaso Poggio

arxiv:1510.05067 v4 · 2015-10-17 · 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{IOGE7UYWQ2EMAHX4NJIYFBRGGU}

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	2026-05-18T01:21:19.304245Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

438c4fd3168688c01efc6a518286263505ebca293ab1cec909466e41cf86119e

Aliases

arxiv: 1510.05067 · arxiv_version: 1510.05067v4 · doi: 10.48550/arxiv.1510.05067 · pith_short_12: IOGE7UYWQ2EM · pith_short_16: IOGE7UYWQ2EMAHX4 · pith_short_8: IOGE7UYW

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/IOGE7UYWQ2EMAHX4NJIYFBRGGU \
  | 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: 438c4fd3168688c01efc6a518286263505ebca293ab1cec909466e41cf86119e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3cf12e81aaaf5499c0b9ac4c52f33e080591866685e9508a7b5f86b2f36b9210",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2015-10-17T03:49:05Z",
    "title_canon_sha256": "d09182bd9698e16f75c9244794f05e285f2a83ea14b69d683192864db72f165c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.05067",
    "kind": "arxiv",
    "version": 4
  }
}