<p>Is there an equivalent operator to Haskell's list difference operator <code>\\</code> in F#?</p>

Nope... Just write it and make it an infix operator --using the set of special characters. Backslash (
```
\
```
) is not in the list below, so it will not work as an infix operator. See the
manual
:
infix-op :=
```
```
or || & && <OP >OP $OP = |OP &OP ^OP :: -OP +OP *OP /OP %OP

**OP
```
```
prefix-op :=
```
```
!OP ?OP ~OP -OP +OP % %% & &&
```
```