Pith Number

pith:ONSOSCCB

pith:2012:ONSOSCCBFLR7PZGASIJDYGTA7D

not attested not anchored not stored refs pending

Faster spectral sparsification and numerical algorithms for SDD matrices

Alex Levin, Ioannis Koutis, Richard Peng

arxiv:1209.5821 v3 · 2012-09-26 · cs.DS

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ONSOSCCBFLR7PZGASIJDYGTA7D}

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	2026-05-18T03:07:02.133929Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7364e908412ae3f7e4c092123c1a60f8e1b1af5ebc9e811d0a477971cd0265b1

Aliases

arxiv: 1209.5821 · arxiv_version: 1209.5821v3 · doi: 10.48550/arxiv.1209.5821 · pith_short_12: ONSOSCCBFLR7 · pith_short_16: ONSOSCCBFLR7PZGA · pith_short_8: ONSOSCCB

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/ONSOSCCBFLR7PZGASIJDYGTA7D \
  | 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: 7364e908412ae3f7e4c092123c1a60f8e1b1af5ebc9e811d0a477971cd0265b1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "325158e268a11f6f5e96156a5103fabc6ac19675b72eb8c5a0a44df3dab78910",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2012-09-26T03:15:16Z",
    "title_canon_sha256": "52ad41329551eaa9159c27beb7513510b70d5d3edc3fe88d522423cd12f652e2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.5821",
    "kind": "arxiv",
    "version": 3
  }
}