But there is more..........................about the connection of addition to multiplication..........which is at the heart of this.........................Euler's product and the Riemann zeta func.................the later which was just an extension of what Euler did...........


9..................my German friend, former friend..........Bac told me...............well, he is Vietnamese by blood.........but he told me every German student learns an important property of nine.........


The number 9..........has an interesting aspect to it....................all its double digit multiples..............when u multiply it by anything less than or equal to 10...........add up to 9..........the single and double digits do...........