Pith Number

pith:ANFDCJ23

pith:2019:ANFDCJ236RLLLJNUM6GHXCZXZZ

not attested not anchored not stored refs pending

Rayleigh Quotient Iteration, cubic convergence, and second covariant derivative

Du Nguyen

arxiv:1908.00639 v4 · 2019-08-01 · math.OC · 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{ANFDCJ236RLLLJNUM6GHXCZXZZ}

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	2026-07-05T06:33:00.530937Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

034a31275bf456b5a5b4678c7b8b37ce7105ebb6b5f5fd41e724081aeacf939b

Aliases

arxiv: 1908.00639 · arxiv_version: 1908.00639v4 · doi: 10.48550/arxiv.1908.00639 · pith_short_12: ANFDCJ236RLL · pith_short_16: ANFDCJ236RLLLJNU · pith_short_8: ANFDCJ23

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/ANFDCJ236RLLLJNUM6GHXCZXZZ \
  | 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: 034a31275bf456b5a5b4678c7b8b37ce7105ebb6b5f5fd41e724081aeacf939b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0ac3b20252e38a5f3eb4120319b83d9ce6ae33ae85f5b850d6911d70ce8a047a",
    "cross_cats_sorted": [
      "cs.NA",
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2019-08-01T21:46:59Z",
    "title_canon_sha256": "01a3c15ea54a221c45917a89249dce5b0ead42cc5d18793046e2e6dc3585643f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.00639",
    "kind": "arxiv",
    "version": 4
  }
}