Pith Number

pith:XNI2ZYEX

pith:2023:XNI2ZYEX3STTIK3K5UBNSXMICD

not attested not anchored not stored refs pending

PopSparse: Accelerated block sparse matrix multiplication on IPU

Adam Sanders, Deniz Beker, Dominic Masters, Douglas Orr, Godfrey Da Costa, Tom Murray, Valeriu Ohan, Zhiyi Li

arxiv:2303.16999 v2 · 2023-03-29 · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XNI2ZYEX3STTIK3K5UBNSXMICD}

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	2026-07-05T05:58:20.473973Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bb51ace097dca7342b6aed02d95d8810ee6b358c834add4302f7bcfcd87a9f51

Aliases

arxiv: 2303.16999 · arxiv_version: 2303.16999v2 · doi: 10.48550/arxiv.2303.16999 · pith_short_12: XNI2ZYEX3STT · pith_short_16: XNI2ZYEX3STTIK3K · pith_short_8: XNI2ZYEX

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/XNI2ZYEX3STTIK3K5UBNSXMICD \
  | 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: bb51ace097dca7342b6aed02d95d8810ee6b358c834add4302f7bcfcd87a9f51

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9f0edf86bd4afcc1671a43adb9b939a290b02764a33d58f4537ce7002e5824a6",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2023-03-29T20:00:19Z",
    "title_canon_sha256": "af537d72ba9bc29d6bff66e0ee605108fcf904b29d0192a3c270a946e04b0f02"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2303.16999",
    "kind": "arxiv",
    "version": 2
  }
}