Pith Number

pith:O7VKPV4P

pith:2026:O7VKPV4P7WHWDS6HK5PFBBQEPI

not attested not anchored not stored refs pending

Effective MPI: User-defined Datatypes and Cartesian Communicators for Zero-copy All-to-all Communication in Multidimensional Tori

Jesper Larsson Tr\"aff

arxiv:2605.29970 v1 · 2026-05-28 · cs.DC

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{O7VKPV4P7WHWDS6HK5PFBBQEPI}

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	2026-05-29T02:06:04.537596Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

77eaa7d78ffd8f61cbc7575e5086047a39f74edd4a7f64f73712aa159509eb28

Aliases

arxiv: 2605.29970 · arxiv_version: 2605.29970v1 · doi: 10.48550/arxiv.2605.29970 · pith_short_12: O7VKPV4P7WHW · pith_short_16: O7VKPV4P7WHWDS6H · pith_short_8: O7VKPV4P

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/O7VKPV4P7WHWDS6HK5PFBBQEPI \
  | 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: 77eaa7d78ffd8f61cbc7575e5086047a39f74edd4a7f64f73712aa159509eb28

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "42437d7ec06276978d7aabd18fe2a424edd756ae661125f076ef900d7ed7aa9c",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.DC",
    "submitted_at": "2026-05-28T14:07:55Z",
    "title_canon_sha256": "79e5d9450b2f708c65739c3b98f223176a117444d4204db8cc495f0c2817a900"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.29970",
    "kind": "arxiv",
    "version": 1
  }
}