We work in bosonic string theory in 26 dimensions and focus on cubic OSFT in the presence of two parallel D24-branes extended in X0,: : :,X24 directions and separated in the X25 direction, studying solutions to this SFT as a function of the separation of the two D24-branesMy highlighting. I thought 7 or 11 dimensions might be enough. How many buses could you drive through 26 dimensions that would be invisible and unmeasurable to us mortals?
Now he is looking for a job. There aren't many in the field of open strings. He is a very fine programmer so I am sure he will not have any problem transferring his skills to another field.