Pith Number

pith:NSMHQ276

pith:2005:NSMHQ276KCAWX6HFPEG2WWWSN6

not attested not anchored not stored refs pending

On eigenvalue and eigenvector estimates for nonnegative definite operators

Luka Grubisic

arxiv:math/0503328 v1 · 2005-03-16 · math.SP · cs.NA · 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{NSMHQ276KCAWX6HFPEG2WWWSN6}

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	2026-06-03T22:06:16.644191Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6c98786bfe50816bf8e5790dab5ad26fb6748b615afa56acf00a065f46c5a89e

Aliases

arxiv: math/0503328 · arxiv_version: math/0503328v1 · doi: 10.48550/arxiv.math/0503328 · pith_short_12: NSMHQ276KCAW · pith_short_16: NSMHQ276KCAWX6HF · pith_short_8: NSMHQ276

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/NSMHQ276KCAWX6HFPEG2WWWSN6 \
  | 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: 6c98786bfe50816bf8e5790dab5ad26fb6748b615afa56acf00a065f46c5a89e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c5d59c2f1549a8573a0c00aafdaa33387d15687a8e8b7c0625a48b9031519f0a",
    "cross_cats_sorted": [
      "cs.NA",
      "math.NA"
    ],
    "license": "",
    "primary_cat": "math.SP",
    "submitted_at": "2005-03-16T14:39:34Z",
    "title_canon_sha256": "cb6f8bf42454d355ebaa334ed531d6995a08a35551568c3d8f3416457389f071"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0503328",
    "kind": "arxiv",
    "version": 1
  }
}