Function scr 

pub fn scr(body: Content) -> Content

Script (roundhand) font style in math.

$scr(L)$ is not the set of linear
maps $cal(L)$.

There are two ways that fonts can support differentiating cal and scr. The first is using Unicode variation sequences. This works out of the box in Typst, however only a few math fonts currently support this.

The other way is using font features. For example, the roundhand style might be available in a font through the stylistic set 1 (ss01) feature. To use it in Typst, you could then define your own version of scr like in the example below.

#let scr(it) = text(
  stylistic-set: 1,
  $cal(it)$,
)

We establish $cal(P) != scr(P)$.