Pith Number

pith:25ITWL52

pith:2013:25ITWL52HLNRMRNUPDKR7HCTZ2

not attested not anchored not stored refs pending

Spectral Condition-Number Estimation of Large Sparse Matrices

Alex Druinsky, Haim Avron, Sivan Toledo

arxiv:1301.1107 v6 · 2013-01-07 · 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{25ITWL52HLNRMRNUPDKR7HCTZ2}

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	2026-05-18T00:06:53.731688Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d7513b2fba3adb1645b478d51f9c53ceb95a1f3855a7cdeebee0ad6dcad79221

Aliases

arxiv: 1301.1107 · arxiv_version: 1301.1107v6 · doi: 10.48550/arxiv.1301.1107 · pith_short_12: 25ITWL52HLNR · pith_short_16: 25ITWL52HLNRMRNU · pith_short_8: 25ITWL52

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/25ITWL52HLNRMRNUPDKR7HCTZ2 \
  | 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: d7513b2fba3adb1645b478d51f9c53ceb95a1f3855a7cdeebee0ad6dcad79221

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2b46480cef8be47d5158ec5403f3c830a770dad29f5af130b5f804fb8d33baf4",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NA",
    "submitted_at": "2013-01-07T04:31:19Z",
    "title_canon_sha256": "dc1e583a61b415b803f313f4f3b0ca12bb8b350e98f90dd95bfa07d3729dc889"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.1107",
    "kind": "arxiv",
    "version": 6
  }
}