Calculating the Inverse of Juggling Sequences: A Mathematical Perspective

[Biosyn]

Homework Statement

Has anyone here read The Mathematics of Juggling by Burkard Polster? I am having a hard time understanding how the inverse of a juggling sequence is calculated on page 27.

For example, the table on the page has 7 rows, and in the fourth row, I'm not sure if that symbol means the inverse of the permutation of the sequence? Or how it is calculated.

 

[dirk_mec1]

Please use standard format of PF.