Pith Number

pith:KTUGVVS2

pith:2026:KTUGVVS2PXHK6RH54FW5B2KZ2U

not attested not anchored not stored refs pending

Stability Implies Redundancy: Delta Attention Selective Halting for Efficient Long-Context Prefilling

Linfeng Zhang, Shaobo Wang, Tailai Chen, Yifeng Gao, Yijue Xu, Yujie Chen, Zoe Wanying He

Tokens reach semantic fixing points where further attention adds nothing, so early halting cuts prefill cost.

arxiv:2604.18103 v2 · 2026-04-20 · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KTUGVVS2PXHK6RH54FW5B2KZ2U}

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.

Claims

C1strongest claim

Tokens evolve toward semantic fixing points, making further processing redundant; DASH monitors layer-wise update dynamics of self-attention to selectively halt stabilized tokens and delivers significant prefill speedups while preserving accuracy and hardware efficiency.

C2weakest assumption

That monitoring layer-wise self-attention deltas reliably identifies tokens whose further computation is redundant without discarding task-critical information, and that this holds across models and tasks without per-model tuning.

C3one line summary

DASH selectively halts stabilized tokens by monitoring layer-wise self-attention deltas, delivering prefill speedups on language and vision tasks without accuracy loss or hardware incompatibility.

Receipt and verification

First computed	2026-05-27T01:05:54.821597Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

54e86ad65a7dceaf44fde16dd0e959d529d77458ecc718da3596c88a58cd4238

Aliases

arxiv: 2604.18103 · arxiv_version: 2604.18103v2 · doi: 10.48550/arxiv.2604.18103 · pith_short_12: KTUGVVS2PXHK · pith_short_16: KTUGVVS2PXHK6RH5 · pith_short_8: KTUGVVS2

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/KTUGVVS2PXHK6RH54FW5B2KZ2U \
  | 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: 54e86ad65a7dceaf44fde16dd0e959d529d77458ecc718da3596c88a58cd4238

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b25ebb6577b94dc4282a0a63d264112298752b99cf29ae14a6971bfd1a2b5e1e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2026-04-20T11:20:03Z",
    "title_canon_sha256": "c5396db11b831878e98a5f45538547177fe7196950cc64aa19519f3b1be9e01d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.18103",
    "kind": "arxiv",
    "version": 2
  }
}