-interpretation "natural transposition" 'transposition i j n =
- (cic:/matita/nat/permutation/transpose.con i j n).
+notation > "(❲\frac term 90 i term 90 j❳)n" with precedence 71
+for @{ 'transposition $i $j $n}.
+
+interpretation "natural transposition" 'transposition i j n = (transpose i j n).