Pith Number

pith:LHNWCMOV

pith:2015:LHNWCMOVTL7S7UCLU5YBZL4FVM

not attested not anchored not stored refs pending

Matrix positivity preservers in fixed dimension. I

Alexander Belton, Apoorva Khare, Dominique Guillot, Mihai Putinar

arxiv:1504.07674 v4 · 2015-04-28 · math.CA · math.CO · math.FA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LHNWCMOVTL7S7UCLU5YBZL4FVM}

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	2026-05-18T01:15:32.597773Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

59db6131d59aff2fd04ba7701caf85ab2981c832ca8176361d16782ec5568772

Aliases

arxiv: 1504.07674 · arxiv_version: 1504.07674v4 · doi: 10.48550/arxiv.1504.07674 · pith_short_12: LHNWCMOVTL7S · pith_short_16: LHNWCMOVTL7S7UCL · pith_short_8: LHNWCMOV

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/LHNWCMOVTL7S7UCLU5YBZL4FVM \
  | 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: 59db6131d59aff2fd04ba7701caf85ab2981c832ca8176361d16782ec5568772

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b53058dcdcccd84268668146fbb1d188750ae5e7c8177deca04d7fae95eae2a0",
    "cross_cats_sorted": [
      "math.CO",
      "math.FA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CA",
    "submitted_at": "2015-04-28T22:18:53Z",
    "title_canon_sha256": "0c3fe4e1e561e75103e00e41b7c088cdd179e4aee5c43049a9da0d9ffb277022"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.07674",
    "kind": "arxiv",
    "version": 4
  }
}