Pith Number

pith:YR3CWHUQ

pith:2016:YR3CWHUQ3FU6VKDVHBTABPBKSH

not attested not anchored not stored refs pending

Nonnegative Matrix Factorization Requires Irrationality

Dmitry Chistikov, Ines Maru\v{s}i\'c, James Worrell, Mahsa Shirmohammadi, Stefan Kiefer

arxiv:1605.06848 v2 · 2016-05-22 · cs.CC · cs.LG · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YR3CWHUQ3FU6VKDVHBTABPBKSH}

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	2026-05-18T00:48:05.674460Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c4762b1e90d969eaa875386600bc2a91e9e81a0ed1872a2581674058891816e4

Aliases

arxiv: 1605.06848 · arxiv_version: 1605.06848v2 · doi: 10.48550/arxiv.1605.06848 · pith_short_12: YR3CWHUQ3FU6 · pith_short_16: YR3CWHUQ3FU6VKDV · pith_short_8: YR3CWHUQ

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/YR3CWHUQ3FU6VKDVHBTABPBKSH \
  | 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: c4762b1e90d969eaa875386600bc2a91e9e81a0ed1872a2581674058891816e4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1c8b76baaffc53032086b4fcf0a73b202b8fc0cbed0e9d6cdf0b7ef1bad97ead",
    "cross_cats_sorted": [
      "cs.LG",
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2016-05-22T20:17:24Z",
    "title_canon_sha256": "472299f5cadb22c3b8a447e8ee9b4874749549d75ff04956365cf7de44237b21"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1605.06848",
    "kind": "arxiv",
    "version": 2
  }
}