Pith Number

pith:RN63E3SA

pith:2012:RN63E3SAIT3LQSS4CW3TJYPIRN

not attested not anchored not stored refs pending

Improved matrix algorithms via the Subsampled Randomized Hadamard Transform

Alex Gittens, Christos Boutsidis

arxiv:1204.0062 v4 · 2012-03-31 · cs.DS · 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{RN63E3SAIT3LQSS4CW3TJYPIRN}

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	2026-05-18T02:21:16.706400Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8b7db26e4044f6b84a5c15b734e1e88b7909fcccfe703490027fcd4253a2bb25

Aliases

arxiv: 1204.0062 · arxiv_version: 1204.0062v4 · doi: 10.48550/arxiv.1204.0062 · pith_short_12: RN63E3SAIT3L · pith_short_16: RN63E3SAIT3LQSS4 · pith_short_8: RN63E3SA

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/RN63E3SAIT3LQSS4CW3TJYPIRN \
  | 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: 8b7db26e4044f6b84a5c15b734e1e88b7909fcccfe703490027fcd4253a2bb25

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9130e6f3f6890f513f86076b49ecc74c052e54df208b540ee0d10669034108c3",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2012-03-31T02:49:46Z",
    "title_canon_sha256": "f3ae8a0bdafb5b277597693d6b5f4a59f1bf3e170f0a16143cb8c3e3f17c1d32"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.0062",
    "kind": "arxiv",
    "version": 4
  }
}