Pith Number

pith:O5JBQ4YX

pith:2018:O5JBQ4YXATNSHEQSCRO276OURW

not attested not anchored not stored refs pending

A note on linear preservers on semipositive and minimal semipositive matrices

K.C. Sivakumar, M. Rajesh Kannan, Projesh Nath Choudhury

arxiv:1806.07168 v1 · 2018-06-19 · 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{O5JBQ4YXATNSHEQSCRO276OURW}

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	2026-05-18T00:12:51.684511Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

775218731704db239212145daff9d48d96a2c02ee31ffc33e6df51f9e949b902

Aliases

arxiv: 1806.07168 · arxiv_version: 1806.07168v1 · doi: 10.48550/arxiv.1806.07168 · pith_short_12: O5JBQ4YXATNS · pith_short_16: O5JBQ4YXATNSHEQS · pith_short_8: O5JBQ4YX

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/O5JBQ4YXATNSHEQSCRO276OURW \
  | 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: 775218731704db239212145daff9d48d96a2c02ee31ffc33e6df51f9e949b902

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4bf3d75a32c400228904d4c6805d6a24a699fffd440f495294143606bd75e2d5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2018-06-19T11:45:43Z",
    "title_canon_sha256": "e8a52c7f30a40657c088f2e4caf78d4b98bac0e43447890639c9fec01e945fcc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.07168",
    "kind": "arxiv",
    "version": 1
  }
}