Pith Number

pith:OLXPA3T2

pith:2026:OLXPA3T2JYQ4N2DCGMNI3U6WDI

not attested not anchored not stored refs pending

Double Preconditioning (DoPr): Optimization for Test-Time Performance, not Validation Loss

Alok Shah, Max Simchowitz, Nikolai Matni, Thomas T. Zhang, Vincent Zhang, Yifei Zhang

arxiv:2606.06418 v1 · 2026-06-04 · cs.LG · cs.AI · cs.SY · eess.SY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OLXPA3T2JYQ4N2DCGMNI3U6WDI}

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	2026-06-05T01:15:45.024931Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

72eef06e7a4e21c6e862331a8dd3d61a2a08ab452babfc2f420171c78a667466

Aliases

arxiv: 2606.06418 · arxiv_version: 2606.06418v1 · doi: 10.48550/arxiv.2606.06418 · pith_short_12: OLXPA3T2JYQ4 · pith_short_16: OLXPA3T2JYQ4N2DC · pith_short_8: OLXPA3T2

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/OLXPA3T2JYQ4N2DCGMNI3U6WDI \
  | 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: 72eef06e7a4e21c6e862331a8dd3d61a2a08ab452babfc2f420171c78a667466

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4dbad2627378960e6e4c2f04bd4a74f1699e77c67922e99d8fe591ecbc7030a7",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.SY",
      "eess.SY"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-06-04T17:22:58Z",
    "title_canon_sha256": "a05243a0894f6582d6c8803cf990debe0132e9b63bd72c46dc87ba1dab52bcc6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.06418",
    "kind": "arxiv",
    "version": 1
  }
}