Pith Number

pith:JRZRMR4V

pith:2026:JRZRMR4VU6IZ543AXDZRWN7Z27

not attested not anchored not stored refs pending

Randomized Flexible LSQR and LSMR with applications to inverse problems

Alberto Bucci, Leonardo Robol, Silvia Gazzola

arxiv:2605.22281 v1 · 2026-05-21 · math.NA · cs.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JRZRMR4VU6IZ543AXDZRWN7Z27}

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	2026-05-22T01:04:35.944323Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4c73164795a7919ef360b8f31b37f9d7e301867fdb1bc2034fadd60f79101a78

Aliases

arxiv: 2605.22281 · arxiv_version: 2605.22281v1 · doi: 10.48550/arxiv.2605.22281 · pith_short_12: JRZRMR4VU6IZ · pith_short_16: JRZRMR4VU6IZ543A · pith_short_8: JRZRMR4V

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/JRZRMR4VU6IZ543AXDZRWN7Z27 \
  | 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: 4c73164795a7919ef360b8f31b37f9d7e301867fdb1bc2034fadd60f79101a78

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "145cc03212a60c374c173d0ed528962f41a7df5eb9f2c201ad28a3d7572ee05b",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-05-21T10:27:19Z",
    "title_canon_sha256": "6822ef33d3ca8c6534eda2857f1d2ee2c41c487474908ef95e6b2f2dee0e4b6b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.22281",
    "kind": "arxiv",
    "version": 1
  }
}