Let  ${{\left( {{a}_{n}} \right)}_{n\ge 1}}$ an increasing sequence and bounded.Calculate
$\underset{n\to \infty }{\mathop{\lim }}\,\left( 2{{a}_{n}}-{{a}_{1}}-{{a}_{2}} \right)\left( 2{{a}_{n}}-{{a}_{2}}-{{a}_{3}} \right)...\left( 2{{a}_{n}}-{{a}_{n-2}}-{{a}_{n-1}} \right)\left( 2{{a}_{n}}-{{a}_{n-1}}-{{a}_{1}} \right).$
1. Let $\{a_n\}_{n \geq 1}$ be an increasing and bounded sequence. We need to calculate the limit:
   \[
   \lim_{n \to \infty} \left( 2a_n - a_1 - a_2 \right) \left( 2a_n - a_2 - a_3 \right) \cdots \left( 2a_n - a_{n-2} - a_{n-1} \right) \left( 2a_n - a_{n-1} - a_1 \right).
   \]

2. Since $\{a_n\}$ is bounded and increasing, it converges to some limit $L$. Thus, $\lim_{n \to \infty} a_n = L$ and $a_n \leq L$ for all $n \geq 1$.

3. Define:
   \[
   x_n = \left( 2a_n - a_1 - a_2 \right) \left( 2a_n - a_2 - a_3 \right) \cdots \left( 2a_n - a_{n-2} - a_{n-1} \right) \left( 2a_n - a_{n-1} - a_1 \right).
   \]

4. For each term in the product, we have:
   \[
   0 \leq 2a_n - a_k - a_{k+1} \leq 2L - 2a_k \quad \text{for all } k \in \{1, 2, \ldots, n-2\},
   \]
   and
   \[
   2a_n - a_{n-1} - a_1 \leq 2L - 2a_1.
   \]

5. Therefore,
   \[
   0 \leq x_n \leq 2^{n-1} (L - a_1)(L - a_2) \cdots (L - a_{n-2})(L - a_1).
   \]

6. Define:
   \[
   y_n = 2^{n-1} (L - a_1)(L - a_2) \cdots (L - a_{n-2})(L - a_1).
   \]

7. If there exists some $k \in \mathbb{N}^*$ such that $y_k = 0$, then $y_n = 0$ for all $n \geq k$. Consequently, $x_n = 0$ for all $n \geq k$, and thus:
   \[
   \lim_{n \to \infty} x_n = 0.
   \]

8. If $y_n > 0$ for all $n \geq 3$, then:
   \[
   \lim_{n \to \infty} \frac{y_{n+1}}{y_n} = \lim_{n \to \infty} 2(L - a_{n-1}) = 0.
   \]

9. By the ratio test (D'Alembert's criterion), we have:
   \[
   \lim_{n \to \infty} y_n = 0 \implies \lim_{n \to \infty} x_n = 0.
   \]

10. Alternatively, using the AM-GM inequality:
    \[
    0 \leq x_n \leq \left( \frac{1 + (2a_n - a_1 - a_2) + (2a_n - a_2 - a_3) + \cdots + (2a_n - a_{n-2} - a_{n-1}) + (2a_n - a_{n-1} - a_1)}{n} \right)^n.
    \]

11. Simplifying the expression inside the parentheses:
    \[
    \frac{1 + 2(n-1)a_n - 2a_1 - 2a_2 - \cdots - 2a_{n-1}}{n} \leq \frac{1 + 2(n-1)L - 2a_1 - 2a_2 - \cdots - 2a_{n-1}}{n}.
    \]

12. Let:
    \[
    y_n = 1 + 2(n-1)L - 2a_1 - 2a_2 - \cdots - 2a_{n-1}.
    \]

13. Applying the Stolz-Cesaro theorem:
    \[
    \lim_{n \to \infty} \frac{y_{n+1} - y_n}{(n+1) - n} = \lim_{n \to \infty} \frac{2L - 2a_n}{1} = 0.
    \]

14. Therefore:
    \[
    \lim_{n \to \infty} \frac{y_n}{n} = 0 \implies \lim_{n \to \infty} \left( \frac{1 + 2(n-1)L - 2a_1 - 2a_2 - \cdots - 2a_{n-1}}{n} \right)^n = 0.
    \]

15. Hence:
    \[
    \lim_{n \to \infty} x_n = 0.
    \]

The final answer is $\boxed{0}$.