Pith Number

pith:LYH2JIAX

pith:2018:LYH2JIAXADUEOVTDXLR4TAAYLO

not attested not anchored not stored refs pending

Practical Sparse Matrices in C++ with Hybrid Storage and Template-Based Expression Optimisation

Conrad Sanderson, Ryan Curtin

arxiv:1811.08768 v3 · 2018-11-20 · cs.MS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LYH2JIAXADUEOVTDXLR4TAAYLO}

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	2026-05-17T23:40:04.062228Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5e0fa4a01700e8475663bae3c980185b9db7086acc146bcb351254c66535e2bc

Aliases

arxiv: 1811.08768 · arxiv_version: 1811.08768v3 · doi: 10.48550/arxiv.1811.08768 · pith_short_12: LYH2JIAXADUE · pith_short_16: LYH2JIAXADUEOVTD · pith_short_8: LYH2JIAX

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/LYH2JIAXADUEOVTDXLR4TAAYLO \
  | 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: 5e0fa4a01700e8475663bae3c980185b9db7086acc146bcb351254c66535e2bc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c931eeff3bf470b88b20b046f67421f51e32ed0ede3d51f77cbe2194c250b298",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.MS",
    "submitted_at": "2018-11-20T06:47:37Z",
    "title_canon_sha256": "86eb29eea75f28615c6e6b2e61ed2fc132b3209c2c320f0e84598751196ee7c6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.08768",
    "kind": "arxiv",
    "version": 3
  }
}