This book uses a variety of special fonts to distinguish between many
mathematical and programming items. These are defined below.
| Special Font | Example | Description |
|---|---|---|
| Italic with no subscripts | m, inc1x, aux, iopt | Calling sequence argument or mathematical variable |
| Italic with subscripts | x1, amn, xj1,j2 | Element of a vector, matrix, or sequence |
| Bold italic lowercase | x, y, z | Vector or sequence |
| Bold italic uppercase | A, B, C | Matrix |
| Gothic uppercase | A, B, C, AGB
IM=ISMAX(4,X,2) | Array
Fortran statement |