Pith Number

pith:B2HNMOJV

pith:2019:B2HNMOJVEVJW5PGJOZYOQP3QOJ

not attested not anchored not stored refs pending

The NMF problem and lattice-subspaces

Ioannis A. Polyrakis

arxiv:1906.05730 v1 · 2019-06-11 · math.RA · cs.NA · 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{B2HNMOJVEVJW5PGJOZYOQP3QOJ}

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	2026-05-17T23:43:24.473713Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0e8ed6393525536ebcc97670e83f707256ee9424871b2f423390474a3c3d38c8

Aliases

arxiv: 1906.05730 · arxiv_version: 1906.05730v1 · doi: 10.48550/arxiv.1906.05730 · pith_short_12: B2HNMOJVEVJW · pith_short_16: B2HNMOJVEVJW5PGJ · pith_short_8: B2HNMOJV

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/B2HNMOJVEVJW5PGJOZYOQP3QOJ \
  | 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: 0e8ed6393525536ebcc97670e83f707256ee9424871b2f423390474a3c3d38c8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e3319b0328a49dfd7fdd70c4a62c0e9687b0ca827ea60e8f2b8a38b8625b8873",
    "cross_cats_sorted": [
      "cs.NA",
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.RA",
    "submitted_at": "2019-06-11T21:15:01Z",
    "title_canon_sha256": "b933b4467e608c0bfb82d9527347fe25538604ff43f4b279b62fa3cc4ec209c3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.05730",
    "kind": "arxiv",
    "version": 1
  }
}