Pith Number

pith:A34TGINT

pith:2009:A34TGINT67RNVF6QSHTFGL2KEC

not attested not anchored not stored refs pending

Minimizing Communication in Linear Algebra

Grey Ballard, James Demmel, Oded Schwartz, Olga Holtz

arxiv:0905.2485 v1 · 2009-05-15 · cs.CC · cs.DS · cs.NA · 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{A34TGINT67RNVF6QSHTFGL2KEC}

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	2026-05-18T04:12:55.166615Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

06f93321b3f7e2da97d091e6532f4a20b50b1a11987c1e00860b73c0869264c2

Aliases

arxiv: 0905.2485 · arxiv_version: 0905.2485v1 · doi: 10.48550/arxiv.0905.2485 · pith_short_12: A34TGINT67RN · pith_short_16: A34TGINT67RNVF6Q · pith_short_8: A34TGINT

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/A34TGINT67RNVF6QSHTFGL2KEC \
  | 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: 06f93321b3f7e2da97d091e6532f4a20b50b1a11987c1e00860b73c0869264c2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e139fbe8c215d59de69ce3075dcb42486d67179fdf0ae4530fc23e4c151949e1",
    "cross_cats_sorted": [
      "cs.DS",
      "cs.NA",
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2009-05-15T07:26:56Z",
    "title_canon_sha256": "22826a8eebe46e5d7c99a87b4f19891ccd9c456f0487d2e590d966f8044f46f9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.2485",
    "kind": "arxiv",
    "version": 1
  }
}