Pith Number

pith:U4SAJ7T7

pith:2019:U4SAJ7T7Q37UFPVQYEQHBJ2IPI

not attested not anchored not stored refs pending

Identifying Sparse Low-Dimensional Structures in Markov Chains: A Nonnegative Matrix Factorization Approach

Abolfazl Hashemi, Haris Vikalo, Mahsa Ghasemi, Ufuk Topcu

arxiv:1909.12898 v2 · 2019-09-27 · cs.LG · cs.SY · eess.SY · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{U4SAJ7T7Q37UFPVQYEQHBJ2IPI}

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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	2026-07-05T00:53:51.463296Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a72404fe7f86ff42beb0c12070a7487a1dfe8b472a5dd5df8ed573be7307678f

Aliases

arxiv: 1909.12898 · arxiv_version: 1909.12898v2 · doi: 10.48550/arxiv.1909.12898 · pith_short_12: U4SAJ7T7Q37U · pith_short_16: U4SAJ7T7Q37UFPVQ · pith_short_8: U4SAJ7T7

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/U4SAJ7T7Q37UFPVQYEQHBJ2IPI \
  | 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: a72404fe7f86ff42beb0c12070a7487a1dfe8b472a5dd5df8ed573be7307678f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "05f09ed3d92099cd532d42782a08431fd79ceecee5a06e87f3d99c6d0bb07788",
    "cross_cats_sorted": [
      "cs.SY",
      "eess.SY",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2019-09-27T20:28:44Z",
    "title_canon_sha256": "31ab24b6cb6f0f47e080b92a88694eec3387a963fc452e2eb4a67d057fdcab56"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.12898",
    "kind": "arxiv",
    "version": 2
  }
}