This symbol denotes the optimal model for a problem.
This symbol denotes the optimal model for a problem. It yields the lowest risk \( \htmlClass{sdt-0000000062}{R} \) for pairs of inputs and outputs.
The symbol \(\hat{f}\) denotes the optimal model for a problem. It yields the lowest risk \( \htmlClass{sdt-0000000062}{R} \) for pairs of inputs and outputs. The goal of machine learning is to optimize \( \htmlClass{sdt-0000000084}{h} \) until it becomes \(\hat{f}\).