Because AMS fonts do not map to the standard English QWERTY keyboard or standard Unicode inputs, you must use a specific workflow to type with them:
\documentclassarticle \usepackageamsmath, amssymb \usepackagemathrsfs % for \mathscr \usepackageeucal % optional: Euler \mathcal ams calligraphy fonts
| Font style | Command | Package | Appearance | |------------|---------|---------|-------------| | Standard math calligraphic | \mathcalABC | built-in (amsfonts) | Uppercase only, formal script | | RSFS script (round, elegant) | \mathscrABC | mathrsfs | Uppercase only, flourished | | Bold calligraphic | \mathbfcalABC | amsmath + bm or calrsfs | Bold script | | Euler script (beautiful) | \mathscrABC | eucal with [euler] option | Uppercase, italic-like | Because AMS fonts do not map to the