Pith Number

pith:TQQRNZU4

pith:2020:TQQRNZU4F6DZKAPCBITCQMCULZ

not attested not anchored not stored refs pending

Positive linear maps and eigenvalue estimates for nonnegative matrices

A. Sharma, M. Pal, R. Sharma

arxiv:2002.00138 v1 · 2020-02-01 · 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{TQQRNZU4F6DZKAPCBITCQMCULZ}

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	2026-07-05T00:37:52.053568Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9c2116e69c2f879501e20a262830545e6680565c9e74593aefce305dfe0e6a77

Aliases

arxiv: 2002.00138 · arxiv_version: 2002.00138v1 · doi: 10.48550/arxiv.2002.00138 · pith_short_12: TQQRNZU4F6DZ · pith_short_16: TQQRNZU4F6DZKAPC · pith_short_8: TQQRNZU4

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/TQQRNZU4F6DZKAPCBITCQMCULZ \
  | 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: 9c2116e69c2f879501e20a262830545e6680565c9e74593aefce305dfe0e6a77

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "76ccd9132e9ac845cc1ca924ca1dba9913fdb5a443b7e23da88251b9184542a8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2020-02-01T04:47:15Z",
    "title_canon_sha256": "2643516e016212a760507a821eec3ac8b8503658acf910272e7957c7be46eac0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2002.00138",
    "kind": "arxiv",
    "version": 1
  }
}