Pith Number

pith:HMG7EM23

pith:2008:HMG7EM23EZZKGHHKKMLRX2XVPE

not attested not anchored not stored refs pending

Two-sided Grassmann-Rayleigh quotient iteration

P.-A. Absil, P. Van Dooren

arxiv:0803.4179 v1 · 2008-03-28 · 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{HMG7EM23EZZKGHHKKMLRX2XVPE}

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	2026-05-18T04:25:51.656090Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3b0df2335b2672a31cea53171beaf5792a4ff3f545c9bc7e158aaaa0ae851863

Aliases

arxiv: 0803.4179 · arxiv_version: 0803.4179v1 · doi: 10.48550/arxiv.0803.4179 · pith_short_12: HMG7EM23EZZK · pith_short_16: HMG7EM23EZZKGHHK · pith_short_8: HMG7EM23

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/HMG7EM23EZZKGHHKKMLRX2XVPE \
  | 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: 3b0df2335b2672a31cea53171beaf5792a4ff3f545c9bc7e158aaaa0ae851863

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e631d5b6196eea9dd7d3c951f9b7e41519bc43fa07bca4acdbed25211ee8ff1f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2008-03-28T18:50:29Z",
    "title_canon_sha256": "3675d8f24cd19e044f7abf9779de9fb1e4097e075f592ba7ed16f008bb1440ee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0803.4179",
    "kind": "arxiv",
    "version": 1
  }
}