Pith Number

pith:RWC4DDW5

pith:2026:RWC4DDW5CXIRK5U3RQXTP22XWP

not attested not anchored not stored refs pending

Locality Does Not Imply Reachability: Boundary Repair in Block-Sparse Causal Attention

Zhibo Yang

arxiv:2606.02680 v1 · 2026-06-01 · 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{RWC4DDW5CXIRK5U3RQXTP22XWP}

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	2026-06-03T00:05:06.275783Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8d85c18edd15d115769b8c2f37eb57b3d08931f30ca2e7bf58be1b62e2dd9402

Aliases

arxiv: 2606.02680 · arxiv_version: 2606.02680v1 · doi: 10.48550/arxiv.2606.02680 · pith_short_12: RWC4DDW5CXIR · pith_short_16: RWC4DDW5CXIRK5U3 · pith_short_8: RWC4DDW5

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/RWC4DDW5CXIRK5U3RQXTP22XWP \
  | 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: 8d85c18edd15d115769b8c2f37eb57b3d08931f30ca2e7bf58be1b62e2dd9402

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7a8cb3674998b12b021b9d8c399fb2541911c9fef4b673ddaa0890b24e08a5aa",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-06-01T15:56:31Z",
    "title_canon_sha256": "56f701ec7f5244d5317a306f4f55b09c375d46f0cecc9d80acb757d3cef58bc3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.02680",
    "kind": "arxiv",
    "version": 1
  }
}