mekso n-ary operator: reciprocal of the sum of the reciprocal of each of X1, X2, ..., Xn (for any natural number n); 1/((1/X1) + (1/X.
Left-groups, but is commutative and associative, so it does not matter. Useful in calculating electrical resistance, manipulating exponentiation/roots/logarithms (enfa), giving examples of binary operators with certain properties, etc. li ry sau'i sy du li pe'o fa'i pe'o su'i pe'o fa'i ry boi ku'e pe'o fa'i sy ku'e ku'e ku'e. See also: "vau'i".