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Equation 10 · Part 2 · Comparing the Main Approaches to AI Accelerator Architecture

subscript

UcompilerU_{\mathrm{compiler}}
subscript

What this part means

The lower label selects a particular version, component, or indexed member of the quantity. For example, x₀ and xₜ can be values at different positions.

Its job in the formula

A subscript distinguishes a version, component, step, or member of a quantity. It does not automatically mean multiplication.

The passage around this formula

Separate UhwU_{\mathrm{hw}} from UcompilerU_{\mathrm{compiler}} before trusting a benchmark. A low delivered-versus-peak ratio on an immature software stack says something about that stack’s age, not about the ceiling of the silicon underneath it.

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Learn the underlying idea

A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.

Open the illustrated subscripts: which member of a family? guide →

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