Pith Number

pith:DITBQMYQ

pith:2026:DITBQMYQW3LFHH7HC5HGKNH7Z6

not attested not anchored not stored refs pending

A multilevel sketch-and-solve method for overdetermined least squares problems

Irina-Beatrice Haas, Michael B. Giles, Yuji Nakatsukasa

arxiv:2605.25809 v1 · 2026-05-25 · math.NA · cs.NA · stat.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DITBQMYQW3LFHH7HC5HGKNH7Z6}

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	2026-05-26T02:05:12.794494Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1a26183310b6d6539fe7174e6534ffcf8482e066ebb52da532bdd569b390d8c3

Aliases

arxiv: 2605.25809 · arxiv_version: 2605.25809v1 · doi: 10.48550/arxiv.2605.25809 · pith_short_12: DITBQMYQW3LF · pith_short_16: DITBQMYQW3LFHH7H · pith_short_8: DITBQMYQ

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/DITBQMYQW3LFHH7HC5HGKNH7Z6 \
  | 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: 1a26183310b6d6539fe7174e6534ffcf8482e066ebb52da532bdd569b390d8c3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "738b35bbfa5b4c79b5aa46b4da825bc36934ed6cbf2ac4226578f08e5e40e120",
    "cross_cats_sorted": [
      "cs.NA",
      "stat.CO"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-05-25T13:02:43Z",
    "title_canon_sha256": "c1079f1896447f151c159674d51a8f30c1ef7b4dfccbaa3ae32cad38b447b406"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.25809",
    "kind": "arxiv",
    "version": 1
  }
}