Pith Number

pith:5XDML4NZ

pith:2026:5XDML4NZK2A77572LBCDBHWY6A

not attested not anchored not stored refs pending

On the nonnegative rank of positive operators

Marko Kandi\'c, Roman Drnov\v{s}ek

arxiv:2605.21232 v1 · 2026-05-20 · 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{5XDML4NZK2A77572LBCDBHWY6A}

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	2026-05-21T01:05:44.726034Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

edc6c5f1b95681fff7fa5844309ed8f01ff6ee7b09ad6db2440b9dc303ede46f

Aliases

arxiv: 2605.21232 · arxiv_version: 2605.21232v1 · doi: 10.48550/arxiv.2605.21232 · pith_short_12: 5XDML4NZK2A7 · pith_short_16: 5XDML4NZK2A77572 · pith_short_8: 5XDML4NZ

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/5XDML4NZK2A77572LBCDBHWY6A \
  | 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: edc6c5f1b95681fff7fa5844309ed8f01ff6ee7b09ad6db2440b9dc303ede46f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b609856d7bb6a39eab93141edd4dfb5f60bffe54fddb1ad46c2d4f67eb41dc2a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2026-05-20T14:22:59Z",
    "title_canon_sha256": "cd8ef977f2aa1ae8a9743e7eebfad6831f7175f7c389bba8abec7fbe60509867"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.21232",
    "kind": "arxiv",
    "version": 1
  }
}