Pith Number

pith:VYXDYMY5

pith:2021:VYXDYMY5RVAKOPR7LSF7SFK4XA

not attested not anchored not stored refs pending

A comparison of eigenvalue-based algorithms and the generalized Lanczos trust-region algorithm for Solving the trust-region subproblem

Fa Wang, Zhongxiao Jia

arxiv:2102.09693 v1 · 2021-02-19 · 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{VYXDYMY5RVAKOPR7LSF7SFK4XA}

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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	2026-07-05T02:16:30.131527Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ae2e3c331d8d40a73e3f5c8bf9155cb80af5adf8cb6be4686c9a18fd1b1a6868

Aliases

arxiv: 2102.09693 · arxiv_version: 2102.09693v1 · doi: 10.48550/arxiv.2102.09693 · pith_short_12: VYXDYMY5RVAK · pith_short_16: VYXDYMY5RVAKOPR7 · pith_short_8: VYXDYMY5

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/VYXDYMY5RVAKOPR7LSF7SFK4XA \
  | 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: ae2e3c331d8d40a73e3f5c8bf9155cb80af5adf8cb6be4686c9a18fd1b1a6868

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4bdc4ebef88596a87b92cc1379b97c42ed4f2bd78d456f5bb12e28ebd8852a16",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2021-02-19T00:42:35Z",
    "title_canon_sha256": "cbccd0cb62b38f16764996989b0f6d1c11b32780dee14fcedd5f8291e1c8e558"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.09693",
    "kind": "arxiv",
    "version": 1
  }
}