Pith Number

pith:AJ6WWT6G

pith:2013:AJ6WWT6GHW6BCCVCTGCXQAGKZM

not attested not anchored not stored refs pending

On the filtering effect of iterative regularization algorithms for linear least-squares problems

Anastasia Cornelio, Federica Porta, Luca Zanni, Marco Prato

arxiv:1307.0930 v1 · 2013-07-03 · math.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{AJ6WWT6GHW6BCCVCTGCXQAGKZM}

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	2026-05-18T03:06:32.512457Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

027d6b4fc63dbc110aa299857800cacb12bf0219e1dd6316884e58b875edc12f

Aliases

arxiv: 1307.0930 · arxiv_version: 1307.0930v1 · doi: 10.48550/arxiv.1307.0930 · pith_short_12: AJ6WWT6GHW6B · pith_short_16: AJ6WWT6GHW6BCCVC · pith_short_8: AJ6WWT6G

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/AJ6WWT6GHW6BCCVCTGCXQAGKZM \
  | 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: 027d6b4fc63dbc110aa299857800cacb12bf0219e1dd6316884e58b875edc12f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "06fbb4b01074ac19e29922c6bfb923fbbf99eda3a47362e94ae22737abe9d9f3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2013-07-03T07:46:14Z",
    "title_canon_sha256": "1ddceab4e26c2c625f41446df9d24e2762c2aeca8a5c649e573c82782fa9627f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.0930",
    "kind": "arxiv",
    "version": 1
  }
}