Pith Number

pith:QXSR7JUB

pith:2016:QXSR7JUBSCFMRK5WDJP4PQZL4J

not attested not anchored not stored refs pending

Operator Positivstellens\"atze for noncommutative polynomials positive on matrix convex sets

Alja\v{z} Zalar

arxiv:1602.00765 v2 · 2016-02-02 · math.OA · 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{QXSR7JUBSCFMRK5WDJP4PQZL4J}

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	2026-05-18T01:03:11.945784Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85e51fa681908ac8abb61a5fc7c32be26fed0bfd06441002fb94013262c2fbd7

Aliases

arxiv: 1602.00765 · arxiv_version: 1602.00765v2 · doi: 10.48550/arxiv.1602.00765 · pith_short_12: QXSR7JUBSCFM · pith_short_16: QXSR7JUBSCFMRK5W · pith_short_8: QXSR7JUB

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/QXSR7JUBSCFMRK5WDJP4PQZL4J \
  | 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: 85e51fa681908ac8abb61a5fc7c32be26fed0bfd06441002fb94013262c2fbd7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e7cd7d5275c616be98ccb75f92a1dd8453d003f2bc2cef9ba173538aea92c142",
    "cross_cats_sorted": [
      "math.FA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OA",
    "submitted_at": "2016-02-02T02:03:16Z",
    "title_canon_sha256": "eb312dbfbbf2cca4cf3d856be93a87c1303e138d8adfb126b22938311010c43f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.00765",
    "kind": "arxiv",
    "version": 2
  }
}