Pith Number

pith:YYFHADND

pith:2009:YYFHADNDGNTJK4HH6LUVG4EATU

not attested not anchored not stored refs pending

A Refined Harmonic Lanczos Bidiagonalization Method and an Implicitly Restarted Algorithm for Computing the Smallest Singular Triplets of Large Matrices

Datian Niu, Zhongxiao Jia

arxiv:0906.2242 v1 · 2009-06-12 · 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{YYFHADNDGNTJK4HH6LUVG4EATU}

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	2026-06-03T23:06:27.110293Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c60a700da333669570e7f2e95370809d2564d24da491d449b44cb5b6e68567ea

Aliases

arxiv: 0906.2242 · arxiv_version: 0906.2242v1 · doi: 10.48550/arxiv.0906.2242 · pith_short_12: YYFHADNDGNTJ · pith_short_16: YYFHADNDGNTJK4HH · pith_short_8: YYFHADND

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/YYFHADNDGNTJK4HH6LUVG4EATU \
  | 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: c60a700da333669570e7f2e95370809d2564d24da491d449b44cb5b6e68567ea

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "185dd90ccbd4134cee8be42276eea25b3a2f57979b6cdca9974cc8347369dd0c",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2009-06-12T01:43:35Z",
    "title_canon_sha256": "bc3d8853d712556e8ae9c8b0eaea1641d8c6680b314187be06cb954b8c979ab7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.2242",
    "kind": "arxiv",
    "version": 1
  }
}