I have this string:

```
str <- c("the author (p. j. Wittgenstein)", "n = 10", "arjen lubach")

```

I want to remove every single letter that is followed by a point.
However, I can't figure out how to combine both aspects in a command. The output should look like this:

```
"the author ( Wittgenstein)" "n = 10" "arjen lubach")

```

I am currently trying

```
gsub(" ?\\<[[:alpha:](?=\\.)]\\> ?", "", str)

```

But that does not do the job :-(

Any help is appreciated. Thank you!