. . . "unary" . . "base-1 representation" . "Unary" . . . . "unary numbers" . "1" . "unary number" . . "unary notation" . "1^''n''" . "unary representation" . "unary numeral system" . . "unary numbering" . . "Unary numeral system" . "arguably" . . . . "Unary numeral system" . .