Pith Number

pith:QOPE3FPS

pith:2025:QOPE3FPSEHAXYZQDDTI5STF7VG

not attested not anchored not stored refs pending

Binsparse: A Specification for Cross-Platform Storage of Sparse Matrices and Tensors

Benjamin Brock, Erik Welch, Hameer Abbasi, Isaac Virshup, James Kitchen, Juni Kim, Spencer Patty, Timothy A. Davis, Willow Ahrens

arxiv:2506.19175 v1 · 2025-06-23 · cs.MS · cs.DC · 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{QOPE3FPSEHAXYZQDDTI5STF7VG}

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	2026-07-05T11:26:10.729287Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

839e4d95f221c17c66031cd1d94cbfa9a2f084cc3cd120f6653f26c6e5d7ccb1

Aliases

arxiv: 2506.19175 · arxiv_version: 2506.19175v1 · doi: 10.48550/arxiv.2506.19175 · pith_short_12: QOPE3FPSEHAX · pith_short_16: QOPE3FPSEHAXYZQD · pith_short_8: QOPE3FPS

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/QOPE3FPSEHAXYZQDDTI5STF7VG \
  | 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: 839e4d95f221c17c66031cd1d94cbfa9a2f084cc3cd120f6653f26c6e5d7ccb1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0f9c8a3eb09a8b9d979ce049612022da9e4597f1ec8789a506bb25c774221d7a",
    "cross_cats_sorted": [
      "cs.DC",
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.MS",
    "submitted_at": "2025-06-23T22:33:58Z",
    "title_canon_sha256": "893c5fc8978736bbc82f3351d09c6227c8182dcec119010eb40dc4d82edb834d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2506.19175",
    "kind": "arxiv",
    "version": 1
  }
}