Pith Number

pith:ATHRGU5B

pith:2018:ATHRGU5BISETEFT7MVTFRP6BMW

not attested not anchored not stored refs pending

The Generalized Matrix Chain Algorithm

Henrik Barthels, Marcin Copik, Paolo Bientinesi

arxiv:1804.04021 v1 · 2018-04-10 · cs.MS · 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{ATHRGU5BISETEFT7MVTFRP6BMW}

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	2026-05-18T00:18:42.335988Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

04cf1353a1448932167f656658bfc165ac2368327bcadec23ae54d11740c277e

Aliases

arxiv: 1804.04021 · arxiv_version: 1804.04021v1 · doi: 10.48550/arxiv.1804.04021 · pith_short_12: ATHRGU5BISET · pith_short_16: ATHRGU5BISETEFT7 · pith_short_8: ATHRGU5B

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/ATHRGU5BISETEFT7MVTFRP6BMW \
  | 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: 04cf1353a1448932167f656658bfc165ac2368327bcadec23ae54d11740c277e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "37cfd2f75d5f6bad853d7c51bc77868fd5ed49a553732feb7f2ce7db83bdb620",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.MS",
    "submitted_at": "2018-04-10T16:32:49Z",
    "title_canon_sha256": "a01e9e7a071938d78d5ee0aa041dd81b63d8c529ffb65ade07d5470aa66c70fa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.04021",
    "kind": "arxiv",
    "version": 1
  }
}