Pith Number

pith:T4QLQPO5

pith:2016:T4QLQPO54ISTBE64DT54FDXZ4R

not attested not anchored not stored refs pending

"Compress and eliminate" solver for symmetric positive definite sparse matrices

Daria A. Sushnikova, Ivan V. Oseledets

arxiv:1603.09133 v4 · 2016-03-30 · math.NA · cs.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{T4QLQPO54ISTBE64DT54FDXZ4R}

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	2026-05-18T00:16:45.863197Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9f20b83ddde2253093dc1cfbc28ef9e457b2561aa47d3c1fef32a715c065593a

Aliases

arxiv: 1603.09133 · arxiv_version: 1603.09133v4 · doi: 10.48550/arxiv.1603.09133 · pith_short_12: T4QLQPO54IST · pith_short_16: T4QLQPO54ISTBE64 · pith_short_8: T4QLQPO5

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/T4QLQPO54ISTBE64DT54FDXZ4R \
  | 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: 9f20b83ddde2253093dc1cfbc28ef9e457b2561aa47d3c1fef32a715c065593a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "34922a561603c273a3cc87024efdc05edd1022d8564d5e5dddb020eb3ff0cbd7",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2016-03-30T11:27:01Z",
    "title_canon_sha256": "00a30b69bdc2f8d2228dcdc19d36b43681c44b25010c5d44e742e074936aa08f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1603.09133",
    "kind": "arxiv",
    "version": 4
  }
}