trinary mathematical operator: [sigma summation of a using variable b over range c].

- sicni
- x
_{1}is a coin/token/is specie issued by x_{2}having value x_{3}of composition including x_{4}.

- grisumji
- x
_{1}is the sum (combined addition result) of x_{2}(plurality of the same type as x_{1}) - simsumji
- x
_{1}is the sum of all of x_{2}added together - snisimsumji
- x
_{1}is the sigma summation of expression x_{2}with variable x_{3}over domain x_{4}. - se'au
*(exp!)* - mathematical quinary operator; big operator: left sequence notation/converter - operator a, sequence b defined as a function on index/argument/variable/parameter c, in set d, under ordering e