表达式16: "x" equals "x" Subscript, 1 , Baseline left brace, "y" Subscript, 1 , Baseline minus "u" Subscript, "v" "e" "r" "t" "i" "c" "a" "l" , Baseline less than "y" less than "y" Subscript, 1 , Baseline plus "u" Subscript, "v" "e" "r" "t" "i" "c" "a" "l" , Baseline , right bracex=x1y1−uvertical<y<y1+uvertical
16
表达式17: "y" equals "y" Subscript, 1 , Baseline left brace, "x" Subscript, 1 , Baseline minus "u" Subscript, "h" "o" "r" "i" "z" "o" "n" "t" "a" "l" , Baseline less than "x" less than "x" Subscript, 1 , Baseline plus "u" Subscript, "h" "o" "r" "i" "z" "o" "n" "t" "a" "l" , Baseline , right bracey=y1x1−uhorizontal<x<x1+uhorizontal
