Equation 12 · Part 2 · How a Model Actually Gets Small Enough to Run on a Phone
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
What this buys, mechanically, is a denser training signal per example. A hard label carries C bits at most, for C classes, and in practice far less once you account for how skewed real label distributions are. A full teacher distribution over the same classes carries a graded judgment about every one of them, on every training example, for free. That is why a student trained this way can match a network many times its size on the same data budget: it is not learning faster, it is being taught with a richer curriculum. The modern survey literature on this technique describes it as the backbone of an entire ecosystem for building small open models from large proprietary ones, with the…
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 surrounding passage
These citations provide research context; check each source for the exact claim it supports.