Pith Number

pith:EWWERENA

pith:2017:EWWERENAWBVCYD7RUSSKSPKXBD

not attested not anchored not stored refs pending

Low-rank updates and a divide-and-conquer method for linear matrix equations

Daniel Kressner, Leonardo Robol, Stefano Massei

arxiv:1712.04349 v2 · 2017-12-12 · 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{EWWERENAWBVCYD7RUSSKSPKXBD}

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	2026-05-17T23:44:48.460948Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

25ac4891a0b06a2c0ff1a4a4a93d5708e742a095153ec61b9ea098e629c0d254

Aliases

arxiv: 1712.04349 · arxiv_version: 1712.04349v2 · doi: 10.48550/arxiv.1712.04349 · pith_short_12: EWWERENAWBVC · pith_short_16: EWWERENAWBVCYD7R · pith_short_8: EWWERENA

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/EWWERENAWBVCYD7RUSSKSPKXBD \
  | 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: 25ac4891a0b06a2c0ff1a4a4a93d5708e742a095153ec61b9ea098e629c0d254

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "08efe4e8a884b9ad17d25086f72b356f7ddbe53fca9e581cbfffd6b669b8237e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2017-12-12T15:20:30Z",
    "title_canon_sha256": "b4894f9ba7ed1e8038b409b51a2341f33fa03b8468959dd5a6f2f3223634bcc8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1712.04349",
    "kind": "arxiv",
    "version": 2
  }
}