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Bitcoin
Bitcoin, Bitcoin's purse security/h1> 1. Introduction Be sure that there will always be people willing to take a fancy on someone else's money, whether we like it or not. The problem of the safety of their storage is not the first thousand years, and it will be relevant for a long time. In....
Calculation of the Pyramid. (Sequence of numerical progressions)
A. Werner, Front side: Progressive sums:-1,-2,-3,-4,-5... 1,2,3,4,5... We express the formulas: Sn= (a₁n²+n)/2, ; Sn-1=(a₁n²-n)/2 ("n" is the number of summable terms, and "a₁" is the first term of the progression.) For negative or positive values of "n", the expressions....