Pith Number

pith:SJYI3EZR

pith:2008:SJYI3EZRNJDV52IXJU5KXT4MWC

not attested not anchored not stored refs pending

A degenerate kernel method for eigenvalue problems of a class of non-compact operators

Esmail Babolian, Hassan Majidian

arxiv:0809.1521 v3 · 2008-09-09 · math.NA · cs.NA · math.FA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SJYI3EZRNJDV52IXJU5KXT4MWC}

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	2026-06-03T22:06:09.762286Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

92708d93316a475ee9174d3aabcf8cb08bbdb944459b18aefe1b6cba0396d4ec

Aliases

arxiv: 0809.1521 · arxiv_version: 0809.1521v3 · doi: 10.48550/arxiv.0809.1521 · pith_short_12: SJYI3EZRNJDV · pith_short_16: SJYI3EZRNJDV52IX · pith_short_8: SJYI3EZR

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/SJYI3EZRNJDV52IXJU5KXT4MWC \
  | 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: 92708d93316a475ee9174d3aabcf8cb08bbdb944459b18aefe1b6cba0396d4ec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "51cc990b92056b2b7d0d53928f4fee6a75fb4b075b0cc3cd68ab51de35a28b93",
    "cross_cats_sorted": [
      "cs.NA",
      "math.FA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2008-09-09T09:38:20Z",
    "title_canon_sha256": "e38afca47f64e167ea346d25a75e4c73f084d35f467534be4993c1295dc68ebb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.1521",
    "kind": "arxiv",
    "version": 3
  }
}