Shemhamforasch
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 Jun23 comment Principal ideal ring @ReneSchipperus Yes. Jul18 comment Algebraic structure for the floating-point arithmetic. Well, nothing could be added to this?.. Jun3 comment How many ways are there to represent the number $N$? Ouch, that was a mistake. Fixed it. Jun3 comment How many ways are there to represent the number $N$? But what about the 2nd or the 3rd part? I can try to reformulate these questions(if needed). Jun3 comment How many ways are there to represent the number $N$? Well, that's what I got: rewrote equation $(1)$ in this way: $1091=10(100a_3+a_1)+(100a_2+a_0)$. $x=100a_3+a_1$, $y=100a_2+a_0$. Thus, $1091 = 10x+y. \ \ 0 \leq x \leq 109$. For every $x$ there is only one $y$, so we get $110$ ways to represent $N$. Feb23 comment A basis for a vector space Thank you for your answers and sorry for any inconvenience. My English isn't perfect at all as it is not my native language. Feb23 comment solving $\sqrt{3-\sqrt{3+x}}=x$. Finding the derivative should help to understand a behavior of the function, I think Jan14 comment How to prove that a set of logical connectives is functionally complete(incomplete)? These are vectors of boolean functions Jan14 comment How to solve $x = 5^{1345}\bmod 58$? Fermat's little theorem Thanks, I got it!