W left parenthesis capital Phi right parenthesis = double vertical line
begin array with 4 rows
first row
begin fraction var phi over left parenthesis var phi subscript 1 baseline , var epsilon subscript 1 baseline right parenthesis end fraction
second cell
0
third cell
ellipsis
fourth cell
0
second row
begin fraction var phi k subscript n2 baseline over left parenthesis var phi subscript 2 baseline , var epsilon subscript 1 baseline right parenthesis end fraction
second cell
begin fraction var phi over left parenthesis var phi subscript 2 baseline , var epsilon subscript 2 baseline right parenthesis end fraction
third cell
ellipsis
fourth cell
0
third row
first cell spans 5 columns
ellipsis
fourth row
begin fraction var phi k subscript n1 baseline over left parenthesis var phi subscript n baseline , var epsilon subscript 1 baseline right parenthesis end fraction
second cell
begin fraction var phi k subscript n2 baseline over left parenthesis var phi subscript n baseline , var epsilon subscript 2 baseline right parenthesis end fraction
third cell
ellipsis
fourth cell
begin fraction var phi k subscript nn minus 1 baseline over left parenthesis var phi subscript n baseline , var epsilon subscript n minus 1 baseline right parenthesis end fraction
fifth cell
begin fraction var phi over left parenthesis var phi subscript n baseline , var epsilon subscript n baseline right parenthesis end fraction
end array
double vertical line