Pith Number

pith:N3GPUANL

pith:2026:N3GPUANLNHACQ7JDGQFW424YKL

not attested not anchored not stored refs pending

Totally Positive Matrices and the Highest-Order Coefficients of the Characteristic Polynomial

Leandro Farina, Tiago Closs

arxiv:2607.18148 v1 · 2026-07-20 · cs.LG · math.RA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{N3GPUANLNHACQ7JDGQFW424YKL}

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	2026-07-21T02:22:19.174219Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6eccfa01ab69c0287d23340b6e6b9852d43db82f9d189e1f36ac231b4ea922f4

Aliases

arxiv: 2607.18148 · arxiv_version: 2607.18148v1 · doi: 10.48550/arxiv.2607.18148 · pith_short_12: N3GPUANLNHAC · pith_short_16: N3GPUANLNHACQ7JD · pith_short_8: N3GPUANL

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/N3GPUANLNHACQ7JDGQFW424YKL \
  | 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: 6eccfa01ab69c0287d23340b6e6b9852d43db82f9d189e1f36ac231b4ea922f4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d5c6bb89d9b7f1307a71e890e31a8cfed46415056b5fc9ec375991202b26b099",
    "cross_cats_sorted": [
      "math.RA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-07-20T16:48:24Z",
    "title_canon_sha256": "f72bfb1f3df6c8049fe6e4dcd4770de41df9bc514f608e9f88a5a1e1101a30a1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.18148",
    "kind": "arxiv",
    "version": 1
  }
}