Pith Number

pith:DL6UKUWO

pith:2026:DL6UKUWOWCLE6POW3SH2XPKJMK

not attested not anchored not stored refs pending

Sequential Preconditioned Conjugate Gradient Method for Linear Statistical Models

Dong-Yue Xie, Guan-Yu Chen, Xi Yang, Zun-Hao Zheng

arxiv:2607.25272 v1 · 2026-07-28 · math.NA · cs.NA · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DL6UKUWOWCLE6POW3SH2XPKJMK}

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	2026-07-29T00:25:12.109510Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1afd4552ceb0964f3dd6dc8fabbd49629d1b725fe5cb0e66482ebe8e75a6cf8d

Aliases

arxiv: 2607.25272 · arxiv_version: 2607.25272v1 · doi: 10.48550/arxiv.2607.25272 · pith_short_12: DL6UKUWOWCLE · pith_short_16: DL6UKUWOWCLE6POW · pith_short_8: DL6UKUWO

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/DL6UKUWOWCLE6POW3SH2XPKJMK \
  | 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: 1afd4552ceb0964f3dd6dc8fabbd49629d1b725fe5cb0e66482ebe8e75a6cf8d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9894f5db62017daf2cae1013884db766bf0776b82ce4a69b166ed001c5480224",
    "cross_cats_sorted": [
      "cs.NA",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-07-28T04:19:49Z",
    "title_canon_sha256": "573ad04625de4b069f7f8e6a77302f1587b39e6826f8cfcc525d317524519a28"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.25272",
    "kind": "arxiv",
    "version": 1
  }
}