Pith Number

pith:B4IYZZLQ

pith:2019:B4IYZZLQQIQ4ZDAYJ6BNJMQ3NL

not attested not anchored not stored refs pending

Dual Space Preconditioning for Gradient Descent

Arnaud Doucet, Chris J. Maddison, Daniel Paulin, Yee Whye Teh

arxiv:1902.02257 v4 · 2019-02-06 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{B4IYZZLQQIQ4ZDAYJ6BNJMQ3NL}

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	2026-07-05T01:57:46.985841Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0f118ce5708221cc8c184f82d4b21b6ac9684a3156d1247d34391537984d7b6a

Aliases

arxiv: 1902.02257 · arxiv_version: 1902.02257v4 · doi: 10.48550/arxiv.1902.02257 · pith_short_12: B4IYZZLQQIQ4 · pith_short_16: B4IYZZLQQIQ4ZDAY · pith_short_8: B4IYZZLQ

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/B4IYZZLQQIQ4ZDAYJ6BNJMQ3NL \
  | 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: 0f118ce5708221cc8c184f82d4b21b6ac9684a3156d1247d34391537984d7b6a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e174136a3aae7b3c6529594e9507116dafea1ab3ba92e57238dd44464e6ac346",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2019-02-06T16:17:39Z",
    "title_canon_sha256": "33234b7ead6c536759decc03d18c2c16bcb3dcca7c913fbcf4b1012d645c5ba9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.02257",
    "kind": "arxiv",
    "version": 4
  }
}