Pith Number

pith:7U7DA2LM

pith:2015:7U7DA2LMJ5FIKS7CYB7UPAFV6G

not attested not anchored not stored refs pending

Sparse plus Low rank Network Identification: A Nonparametric Approach

Alessandro Chiuso, Mattia Zorzi

arxiv:1510.02961 v2 · 2015-10-10 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7U7DA2LMJ5FIKS7CYB7UPAFV6G}

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	2026-05-18T01:02:56.790360Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd3e30696c4f4a854be2c07f4780b5f1a09ecfcf2d1826acd0b8da5a39ced262

Aliases

arxiv: 1510.02961 · arxiv_version: 1510.02961v2 · doi: 10.48550/arxiv.1510.02961 · pith_short_12: 7U7DA2LMJ5FI · pith_short_16: 7U7DA2LMJ5FIKS7C · pith_short_8: 7U7DA2LM

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/7U7DA2LMJ5FIKS7CYB7UPAFV6G \
  | 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: fd3e30696c4f4a854be2c07f4780b5f1a09ecfcf2d1826acd0b8da5a39ced262

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "810e9c273d4f3ddbdc07888c36dd3b910ccec3217c341652d5d62bb6f50f0c44",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2015-10-10T17:00:26Z",
    "title_canon_sha256": "2ba5f7a84457a0c8feb61c5629d0af768df9eb26e37b2ef07ce0de058697ce24"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.02961",
    "kind": "arxiv",
    "version": 2
  }
}