Pith Number

pith:L2UO634U

pith:2015:L2UO634U3LEJVCXYLZSH2TM6LE

not attested not anchored not stored refs pending

Finding a low-rank basis in a matrix subspace

Andr\'e Uschmajew, Tasuku Soma, Yuji Nakatsukasa

arxiv:1503.08601 v2 · 2015-03-30 · cs.NA · 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{L2UO634U3LEJVCXYLZSH2TM6LE}

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	2026-05-18T01:11:51.742945Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5ea8ef6f94dac89a8af85e647d4d9e593f36e8ec27b0f2698092b8ab420490ef

Aliases

arxiv: 1503.08601 · arxiv_version: 1503.08601v2 · doi: 10.48550/arxiv.1503.08601 · pith_short_12: L2UO634U3LEJ · pith_short_16: L2UO634U3LEJVCXY · pith_short_8: L2UO634U

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/L2UO634U3LEJVCXYLZSH2TM6LE \
  | 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: 5ea8ef6f94dac89a8af85e647d4d9e593f36e8ec27b0f2698092b8ab420490ef

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1f34aee998186fdb5f4af51354507bb64ed17df42ba104ece1b785c3095905cf",
    "cross_cats_sorted": [
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NA",
    "submitted_at": "2015-03-30T09:04:40Z",
    "title_canon_sha256": "6af7b04e4d9ba0d235f399368618589b813da54f493a1660a4b2cb3e50ab6980"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.08601",
    "kind": "arxiv",
    "version": 2
  }
}