Pith Number

pith:ZQ5HOWTI

pith:2023:ZQ5HOWTINMJVZJY4OJRUSTWODY

not attested not anchored not stored refs pending

Perfect Copositive Matrices

Achill Sch\"urmann, Valentin Dannenberg

arxiv:2303.17310 v4 · 2023-03-30 · math.MG · math.NT · math.OC

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZQ5HOWTINMJVZJY4OJRUSTWODY}

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	2026-06-09T02:06:58.303347Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cc3a775a686b135ca71c7263494ece1e074bc05e6fd7f5848021292c83c8fa44

Aliases

arxiv: 2303.17310 · arxiv_version: 2303.17310v4 · doi: 10.48550/arxiv.2303.17310 · pith_short_12: ZQ5HOWTINMJV · pith_short_16: ZQ5HOWTINMJVZJY4 · pith_short_8: ZQ5HOWTI

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/ZQ5HOWTINMJVZJY4OJRUSTWODY \
  | 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: cc3a775a686b135ca71c7263494ece1e074bc05e6fd7f5848021292c83c8fa44

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "db9faa43032c0844478a700ccde68c91a796e486a44c1526e7a7edeb96a7c29a",
    "cross_cats_sorted": [
      "math.NT",
      "math.OC"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.MG",
    "submitted_at": "2023-03-30T11:55:33Z",
    "title_canon_sha256": "3af4da5e41089400ab7341f051f95289d05ea7a42f1bb119e47b10c571d98cf8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2303.17310",
    "kind": "arxiv",
    "version": 4
  }
}