Pith Number

pith:LAJGRQX7

pith:2013:LAJGRQX7BPIJAZ3LPHDYAVVX4Q

not attested not anchored not stored refs pending

A fast numerical algorithm for constructing nonnegative matrices with prescribed real eigenvalues

Matthew M. Lin

arxiv:1305.7444 v2 · 2013-05-31 · 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{LAJGRQX7BPIJAZ3LPHDYAVVX4Q}

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	2026-05-18T02:45:23.389235Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

581268c2ff0bd090676b79c78056b7e4175f7d9a52c3f4d028aa126acc82f5b7

Aliases

arxiv: 1305.7444 · arxiv_version: 1305.7444v2 · doi: 10.48550/arxiv.1305.7444 · pith_short_12: LAJGRQX7BPIJ · pith_short_16: LAJGRQX7BPIJAZ3L · pith_short_8: LAJGRQX7

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/LAJGRQX7BPIJAZ3LPHDYAVVX4Q \
  | 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: 581268c2ff0bd090676b79c78056b7e4175f7d9a52c3f4d028aa126acc82f5b7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "10b1b5e1dabe4fd881ff41a142fdd482a426a63e268867a9a0ca995ae791a6ac",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2013-05-31T15:09:56Z",
    "title_canon_sha256": "382e50522ac3c8dcf1c35875ddc443e059c43d5d8cbe7d48def2778ead524a9a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.7444",
    "kind": "arxiv",
    "version": 2
  }
}