Pith Number

pith:4MWCNO6F

pith:2021:4MWCNO6FFHAQPZOC4M3BTXB5SH

not attested not anchored not stored refs pending

Tightening the Biological Constraints on Gradient-Based Predictive Coding

Emre Neftci, Nick Alonso

arxiv:2104.15137 v2 · 2021-04-30 · cs.NE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4MWCNO6FFHAQPZOC4M3BTXB5SH}

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	2026-07-05T03:38:59.822869Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e32c26bbc529c107e5c2e33619dc3d91dfc15be74021dbe02c8c1389f18b2b65

Aliases

arxiv: 2104.15137 · arxiv_version: 2104.15137v2 · doi: 10.48550/arxiv.2104.15137 · pith_short_12: 4MWCNO6FFHAQ · pith_short_16: 4MWCNO6FFHAQPZOC · pith_short_8: 4MWCNO6F

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/4MWCNO6FFHAQPZOC4M3BTXB5SH \
  | 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: e32c26bbc529c107e5c2e33619dc3d91dfc15be74021dbe02c8c1389f18b2b65

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "708c568e039400570c06a439f0876a23c8353a772ee8d2734f4f21e23890a05f",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.NE",
    "submitted_at": "2021-04-30T17:56:00Z",
    "title_canon_sha256": "5768aab5a6317871347a1ba84d0186a0e6e89a83a533b50c30920db0345ee8cc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.15137",
    "kind": "arxiv",
    "version": 2
  }
}