Pith Number

pith:P7EUK7JD

pith:2013:P7EUK7JDAX4VDLQPSFZNF5EUMF

not attested not anchored not stored refs pending

Direct QR factorizations for tall-and-skinny matrices in MapReduce architectures

Austin R. Benson, David F. Gleich, James Demmel

arxiv:1301.1071 v1 · 2013-01-06 · cs.DC · cs.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{P7EUK7JDAX4VDLQPSFZNF5EUMF}

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	2026-05-18T00:26:47.583272Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7fc9457d2305f951ae0f9172d2f494614eea15a0517bec92cd57df36416dfdc2

Aliases

arxiv: 1301.1071 · arxiv_version: 1301.1071v1 · doi: 10.48550/arxiv.1301.1071 · pith_short_12: P7EUK7JDAX4V · pith_short_16: P7EUK7JDAX4VDLQP · pith_short_8: P7EUK7JD

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/P7EUK7JDAX4VDLQPSFZNF5EUMF \
  | 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: 7fc9457d2305f951ae0f9172d2f494614eea15a0517bec92cd57df36416dfdc2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0616682f31db519f2c077b5cb33e80d1cc68d714614954caddd47fedd2d192e8",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DC",
    "submitted_at": "2013-01-06T22:56:36Z",
    "title_canon_sha256": "52b517a90e47e98fe647c154650ca0daa0cb12a7bb6508585296c1271921d72a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.1071",
    "kind": "arxiv",
    "version": 1
  }
}