outerShape -- the outer shape of a (skew) Young tableau

• Usage:

  mu = outerShape T

• Inputs:
  • T, an instance of the type YoungTableau, a Young tableau of shape $\lambda/\mu$.
• Outputs:
  • lam, an instance of the type Partition, the outer shape, $\lambda, of T.

i1 : T = youngTableau(new Partition from {4,3,1,0}, new Partition from {3,1})

                 ┌───┐
o1 =             │   │
         ┌───┬───┼───┘
         │   │   │    
     ┌───┼───┴───┘    
     │   │            
     └───┘            

o1 : YoungTableau

i2 : outerShape T

o2 = Partition{4, 3, 1, 0}

o2 : Partition