Pith Number

pith:UJE5B7IN

pith:2015:UJE5B7INC5IDUFN6YALFWL5XRH

not attested not anchored not stored refs pending

Fast nonnegative least squares through flexible Krylov subspaces

Silvia Gazzola, Yves Wiaux

arxiv:1511.06269 v3 · 2015-11-19 · 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{UJE5B7INC5IDUFN6YALFWL5XRH}

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	2026-05-18T00:53:17.736833Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a249d0fd0d17503a15bec0165b2fb789c1674d9170d7b1440f6086b96a630485

Aliases

arxiv: 1511.06269 · arxiv_version: 1511.06269v3 · doi: 10.48550/arxiv.1511.06269 · pith_short_12: UJE5B7INC5ID · pith_short_16: UJE5B7INC5IDUFN6 · pith_short_8: UJE5B7IN

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/UJE5B7INC5IDUFN6YALFWL5XRH \
  | 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: a249d0fd0d17503a15bec0165b2fb789c1674d9170d7b1440f6086b96a630485

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c76e40cde856abd543a8d16b36502c84e66c50199968ef2bf015e8e8212d5e37",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-11-19T17:33:07Z",
    "title_canon_sha256": "8c03a8721953c41395c5ded89da40effbe87e296bccf6ff368b90141479f22b0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1511.06269",
    "kind": "arxiv",
    "version": 3
  }
}