Pith Number

pith:SQVE2NMA

pith:2016:SQVE2NMAUJSDX2SRPNINVYREGT

not attested not anchored not stored refs pending

A Real QZ Algorithm for Structured Companion Pencils

Luca Gemignani, Paola Boito, Yuli Eidelman

arxiv:1608.05395 v3 · 2016-08-18 · 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{SQVE2NMAUJSDX2SRPNINVYREGT}

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	2026-05-18T00:48:01.081484Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

942a4d3580a2643bea517b50dae22434fcb12eb5db82e951377b59b37a28842d

Aliases

arxiv: 1608.05395 · arxiv_version: 1608.05395v3 · doi: 10.48550/arxiv.1608.05395 · pith_short_12: SQVE2NMAUJSD · pith_short_16: SQVE2NMAUJSDX2SR · pith_short_8: SQVE2NMA

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/SQVE2NMAUJSDX2SRPNINVYREGT \
  | 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: 942a4d3580a2643bea517b50dae22434fcb12eb5db82e951377b59b37a28842d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b40f77948acb1ddb7edb192503637a773f4c9542b64e4cf3b33f431ebe9d4fa4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2016-08-18T19:53:58Z",
    "title_canon_sha256": "8b8548d08e004e94bd3698174e1ea8a507525a20abbf5001ade366beadd61133"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1608.05395",
    "kind": "arxiv",
    "version": 3
  }
}