@ellenor2000 In the states, a "sheltered workshop" is a place where people who cannot have ordinary jobs, typically, people who are "handicapped" in one way or another, are subsidized to provide employment.
I used it for a smile, but what I meant was that the math pages are mostly written by people who would not have gainful employment if it involved interaction with the rest of us.
 
      
  
             
      
  
             
      
  
             
      
  
             
      
  
             
      
  
            