Pith Number

pith:2RYPWITC

pith:2015:2RYPWITCRGO5XIXZSMW6NPO4EZ

not attested not anchored not stored refs pending

Nonnegative Matrix Factorization applied to reordered pixels of single images based on patches to achieve structured nonnegative dictionaries

James H. Curry, Kye M. Taylor, Richard M. Charles

arxiv:1506.08110 v1 · 2015-06-24 · cs.CV · 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{2RYPWITCRGO5XIXZSMW6NPO4EZ}

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	2026-05-18T01:37:48.033611Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d470fb2262899ddba2f9932de6bddc264bf388882359cda668b22f7d428f2b5d

Aliases

arxiv: 1506.08110 · arxiv_version: 1506.08110v1 · doi: 10.48550/arxiv.1506.08110 · pith_short_12: 2RYPWITCRGO5 · pith_short_16: 2RYPWITCRGO5XIXZ · pith_short_8: 2RYPWITC

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/2RYPWITCRGO5XIXZSMW6NPO4EZ \
  | 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: d470fb2262899ddba2f9932de6bddc264bf388882359cda668b22f7d428f2b5d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d637d8c248e73a56fd953a9073adb5862f86f3d5d7b118316a6edac105a0d1bc",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2015-06-24T17:27:11Z",
    "title_canon_sha256": "9c88eeda2956ebd4fe4af0e4be3f48a8f2db653cf363c955e9dd783a4775a192"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.08110",
    "kind": "arxiv",
    "version": 1
  }
}