Source: wikibot/hat-notation
= Hat notation
{wiki=Hat_notation}
Hat notation, often represented by a caret (^) or "hat" symbol, is commonly used in various fields, including mathematics, statistics, and computer science, to denote certain specific meanings. Here are some common contexts in which hat notation is used: 1. **Estimation**: In statistics, a hat over a variable (e.g., \\(\\hat\{\\theta\}\\)) typically represents an estimate of the true parameter (\\(\\theta\\)).