Equation 5 · Part 2 · Shipping an On-Device AI Feature That Actually Works in the Field
subscript
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.
Full expression→subscript→Article meaning
The passage around this formula
The consequence is structural rather than a tuning detail: appears in every request’s cost regardless of p , so a router only pays for itself if the local attempt is cheap relative to what it saves, and a router that is expensive to run locally can lose to simply escalating difficult-looking requests immediately based on a cheap, coarse signal computed before committing to the full local attempt.
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 →
Sources cited in the article section
These citations provide research context; check each source for the exact claim it supports.