About one set of functions

The realization of Boolean functions with circuits of unreliable functional elements in bases, contained the function $h(x_1,...,x_{2k+1})$ from set $H_{2k+1}$ is considered. The basis elements are supposed to be prone to inverse faults on element inputs independently from each other with the probability ($\epsilon \in (0; 1/2)$). I this work there are demonstrated: 1) in arbitrary finite full basis B, contained function $h(x_1,...,x_{2k+1})$ from set $H_{2k+1}$, all Boolean functions are possible to realize with circuits with reliability at most $a\epsilon^{k+1}+\epsilon^{k+2}$ at $\epsilon \leq \frac{1}{48am^2(2k+1)}$, where $a=C_{2k+1}^{k+1}$, $m$ is the greatest number of element inputs in finite full basis B; 2) in basis $\tilde{B}$, contained all functions, depended at most on two variables, and the function $h(x_1,...,x_{2k+1}) \in H_{2k+1}$, functions are possible to realize with asymptotically optimal on reliability circuits, worked with unreliability, asymptotically equal to $a\epsilon^{k+1}$ (at $\epsilon \to 0$), where $a=C_{2k+1}^{k+1}$.