Pith Number

pith:2ODX7A5S

pith:2014:2ODX7A5SIJXL2NVUFFS6YIVDSX

not attested not anchored not stored refs pending

Preserving positivity for matrices with sparsity constraints

Apoorva Khare, Bala Rajaratnam, Dominique Guillot

arxiv:1406.3408 v3 · 2014-06-13 · math.FA · math.CA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2ODX7A5SIJXL2NVUFFS6YIVDSX}

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	2026-05-18T00:55:25.912300Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d3877f83b2426ebd36b42965ec22a395ef81eca8f1a894e5db61b187e9267530

Aliases

arxiv: 1406.3408 · arxiv_version: 1406.3408v3 · doi: 10.48550/arxiv.1406.3408 · pith_short_12: 2ODX7A5SIJXL · pith_short_16: 2ODX7A5SIJXL2NVU · pith_short_8: 2ODX7A5S

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/2ODX7A5SIJXL2NVUFFS6YIVDSX \
  | 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: d3877f83b2426ebd36b42965ec22a395ef81eca8f1a894e5db61b187e9267530

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7cccb984c34a372b273fbb16e057280715ef637a60a3d6c07ee9522feb7db148",
    "cross_cats_sorted": [
      "math.CA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2014-06-13T02:37:16Z",
    "title_canon_sha256": "61706abbf97b68c82ed3eb2cf889dbbe09a8eaa9adbc8641e5aaa8f0839d338f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1406.3408",
    "kind": "arxiv",
    "version": 3
  }
}