Pith Number

pith:6JIK4UZF

pith:2011:6JIK4UZFHDW4SRUWEQS4SAXPMJ

not attested not anchored not stored refs pending

Retaining positive definiteness in thresholded matrices

Bala Rajaratnam, Dominique Guillot

arxiv:1108.3325 v1 · 2011-08-16 · math.ST · stat.TH

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6JIK4UZFHDW4SRUWEQS4SAXPMJ}

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	2026-05-18T04:15:27.522057Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f250ae532538edc946962425c902ef62647ef1d065836738167162c40ba6d707

Aliases

arxiv: 1108.3325 · arxiv_version: 1108.3325v1 · doi: 10.48550/arxiv.1108.3325 · pith_short_12: 6JIK4UZFHDW4 · pith_short_16: 6JIK4UZFHDW4SRUW · pith_short_8: 6JIK4UZF

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/6JIK4UZFHDW4SRUWEQS4SAXPMJ \
  | 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: f250ae532538edc946962425c902ef62647ef1d065836738167162c40ba6d707

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2ee9a38d951284ed0331eb360bc17993fd28750775ef3530e897de901d432341",
    "cross_cats_sorted": [
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.ST",
    "submitted_at": "2011-08-16T19:24:52Z",
    "title_canon_sha256": "48b5f2f2d41177afeb25fd163a8cc587bea42be3756fb49edbf4a96a9df52ce4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1108.3325",
    "kind": "arxiv",
    "version": 1
  }
}