Pith Number

pith:JGZK6QAT

pith:2012:JGZK6QATDU3KNCV3PFZ35GFXGD

not attested not anchored not stored refs pending

Fast matrix multiplication using coherent configurations

Christopher Umans, Henry Cohn

arxiv:1207.6528 v2 · 2012-07-27 · math.NA · 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{JGZK6QATDU3KNCV3PFZ35GFXGD}

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	2026-05-18T03:37:41.175366Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

49b2af40131d36a68abb7973be98b730c3705494a25ebe64c5daa1df20e61437

Aliases

arxiv: 1207.6528 · arxiv_version: 1207.6528v2 · doi: 10.48550/arxiv.1207.6528 · pith_short_12: JGZK6QATDU3K · pith_short_16: JGZK6QATDU3KNCV3 · pith_short_8: JGZK6QAT

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/JGZK6QATDU3KNCV3PFZ35GFXGD \
  | 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: 49b2af40131d36a68abb7973be98b730c3705494a25ebe64c5daa1df20e61437

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8a6d6af75ad95538c24bee214650782a45510caf816fbf39e9361362b5e0801f",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2012-07-27T12:38:22Z",
    "title_canon_sha256": "042e51a933cf622d68e76106089aee3f868b8967a15a64b2be53fb79de3dcb47"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.6528",
    "kind": "arxiv",
    "version": 2
  }
}