You Could Have Come Up with Kimi Delta Attention

Jamie Dborin· Jul 28, 2026 · 4:02 PM UTC ·18 min read · 0 reactions · 0 comments · 2 views

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Doubleword

TL;DR · WeSearch summary

'Use bra-ket notation' : 'Use vector notation', ); try { window.localStorage.setItem(STORAGE_KEY, useVectors ? The Math notation switch above rewrites every equation using conventional bold vectors and explicit transposes instead. In bra-ket mode, ∣q⟩\lvert q\rangle∣q⟩ is a column vector, ⟨k∣\langle k\rvert⟨k∣ is a row vector, ⟨k∣q⟩\langle k\rvert q\rangle⟨k∣q⟩ is a number, and ∣v⟩⟨k∣\lvert v\rangle\langle k\rvert∣v⟩⟨k∣ is a matrix.

Key facts

▪'Use bra-ket notation' : 'Use vector notation', ); try { window.localStorage.setItem(STORAGE_KEY, useVectors ?
▪The Math notation switch above rewrites every equation using conventional bold vectors and explicit transposes instead.
▪In bra-ket mode, ∣q⟩\lvert q\rangle∣q⟩ is a column vector, ⟨k∣\langle k\rvert⟨k∣ is a row vector, ⟨k∣q⟩\langle k\rvert q\rangle⟨k∣q⟩ is a number, and ∣v⟩⟨k∣\lvert v\rangle\langle k\rvert∣v⟩⟨k∣ is a matrix.

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Original article

Doubleword · Jamie Dborin

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Record

Original publisher	Doubleword
Canonical URL	https://blog.doubleword.ai/you-could-have-come-up-with-kimi-delta-attention
Publication time	Tue, 28 Jul 2026 16:02:07 +0000
Retrieval time	2026-07-28T16:35:32.170Z
Last seen	2026-07-28T16:35:32.170Z
Headline source	Publisher (no WeSearch rewrite)
Excerpt source	publisher body
Excerpt method	First ~120 words (~800 chars) of extracted publisher body, fair-use limited.
Summary	WeSearch · cerebras-chat (WeSearch summarizer)
Summary source text	contentText
Citation coverage	Summary is a WeSearch-generated derivative; primary citation is the original publisher URL.
Cluster	UblF87BJwqVc · 1 stories
Cluster logic	Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison.
Ranking reason	Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking.
Publisher visit	Yes — open original
Substitutes article?	No — link-out required for full text

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No publisher-confirmed rights record for this source yet.

Machine-readable

No source-specific machine-readable restriction detected beyond the public feed.

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Unknown

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WeSearch handling by dimension

Indexing	May the item be indexed (stored, ranked, made findable)?	Allowed
Snippet	May a short excerpt of the publisher's text be shown?	Allowed
AI summary	May WeSearch generate its own short summary of the article?	Limited
Retrieval / RAG	May the content be exposed for third-party retrieval-augmented generation?	Not asserted
Model training	May the content be used to train AI models?	Not asserted
Commercial reuse	May the content be reused commercially?	Not permitted

Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.

Open original publisher → Source rights JSON → Machine-readable provenance → Rights framework → WESEARCH-STORY-PROVENANCE-V1

Opening excerpt (first ~120 words) tap to expand

←July 27, 2026Inference APIAPIYou Could Have Come Up With Kimi Delta AttentionJamie DborinFounder & Member of Technical Staff, Doubleword Math notation ⟨k|q⟩ kᵀq [data-portable-math-notation-vector][hidden], [data-portable-math-notation-bra][hidden] { display: none !important; } [data-portable-math-notation-control] { display: flex; align-items: center; justify-content: flex-end; gap: 0.65rem; margin: -0.25rem 0 1.75rem; font-size: 0.88rem; } [data-portable-math-notation-control][hidden] { display: none; } [data-portable-math-notation-control] .math-notation-label { color: rgb(var(--gray, 115, 115, 115)); font-weight: 700; letter-spacing: 0.01em; } [data-portable-math-notation-switch] { display: inline-flex; align-items: center; gap: 0.5rem; margin: 0; padding: 0.35rem 0.55rem; border:…

Excerpt limited to ~120 words for fair-use compliance. The full article is at Doubleword.

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