Yes, the title says it all.
What would be the major benefits of a mission, let's say, to Mars, with a single crew member.
The reduce of weight would one major issue, I guess.
Of course it would have to be someone extremely ultra prepared to correspond to the mission demandings, someone covering areas such as geology, biology not to say the technical issues concerning a spaceflight...
Against? Isolation?...
Maybe by reducing the mission to the minimal accepted period and inducing long periods of sleep during the voyage...
Are there any available studies regarding this matter? All the things I've read point to a >1 crew, I would like to see something discussing the one man possibility.