← All parts of this equation

Equation 9 · Part 1 · Reliable AI Agents Are Control Systems, Not Chatbots

Symbol Z_k

Zk(x)\mathcal{Z}_k(x)
Zk\mathcal{Z}_k

What this part means

ZkZ_k is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

Its job in the formula

ZkZ_k is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

The passage around this formula

where the retriever assigns probability to documents z and the generator conditions on a selected set Zk(x)\mathcal{Z}_k(x) [ 6 ] . The decomposition matters because retrieval and generation fail differently.

Read this part in the article →

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 →

See this notation across published equations →

Sources cited in the surrounding passage

These citations provide research context; check each source for the exact claim it supports.