The basic numbers of the Leslie matrix are often (following the usual notations) :
[tex]n_x[/tex], the number [tex]n[/tex] of individuals of age [tex]x[/tex],
[tex]s_x[/tex], the percentage of individuals that remain from age [tex]x[/tex] to [tex]x+1[/tex],
[tex]f_x[/tex], the per capita (average) number of individuals that get up to [tex]n_0[/tex] born from an individual of age [tex]x[/tex]
