Let $\displaystyle {x_i> 1, \forall i \in \left \{1, 2, 3, \ldots, 2011 \right \}}$. Show that:$$\displaystyle{\frac{x^2_1}{x_2-1}+\frac{x^2_2}{x_3-1}+\frac{x^2_3}{x_4-1}+\ldots+\frac{x^2_{2010}}{x_{2011}-1}+\frac{x^2_{2011}}{x_1-1}\geq 8044}$$
When the equality holds?
1. **Define the sum of the variables:**
   Let \( s = x_1 + x_2 + \ldots + x_{2011} \). Given that \( x_i > 1 \) for all \( i \), it follows that \( s > 2011 \).

2. **Apply the Cauchy-Schwarz Inequality:**
   The Cauchy-Schwarz Inequality states that for any sequences of real numbers \( a_i \) and \( b_i \),
   \[
   \left( \sum_{i=1}^{n} \frac{a_i^2}{b_i} \right) \left( \sum_{i=1}^{n} b_i \right) \geq \left( \sum_{i=1}^{n} a_i \right)^2.
   \]
   In our case, let \( a_i = x_i \) and \( b_i = x_{i+1} - 1 \) (with \( x_{2012} = x_1 \)). Then,
   \[
   \sum_{i=1}^{2011} \frac{x_i^2}{x_{i+1} - 1} \geq \frac{\left( \sum_{i=1}^{2011} x_i \right)^2}{\sum_{i=1}^{2011} (x_{i+1} - 1)}.
   \]

3. **Simplify the denominator:**
   Notice that
   \[
   \sum_{i=1}^{2011} (x_{i+1} - 1) = (x_2 - 1) + (x_3 - 1) + \ldots + (x_{2011} - 1) + (x_1 - 1).
   \]
   This simplifies to
   \[
   \sum_{i=1}^{2011} (x_{i+1} - 1) = (x_1 + x_2 + \ldots + x_{2011}) - 2011 = s - 2011.
   \]

4. **Combine the results:**
   Using the Cauchy-Schwarz Inequality, we have
   \[
   \sum_{i=1}^{2011} \frac{x_i^2}{x_{i+1} - 1} \geq \frac{s^2}{s - 2011}.
   \]

5. **Analyze the inequality:**
   We need to show that
   \[
   \frac{s^2}{s - 2011} \geq 8044.
   \]
   This can be rewritten as
   \[
   s^2 \geq 8044(s - 2011).
   \]
   Expanding and rearranging terms, we get
   \[
   s^2 - 8044s + 8044 \times 2011 \geq 0.
   \]
   This simplifies to
   \[
   s^2 - 8044s + 16184444 \geq 0.
   \]
   The discriminant of this quadratic equation is
   \[
   \Delta = 8044^2 - 4 \times 16184444 = 0.
   \]
   Therefore, the quadratic equation has a double root at
   \[
   s = \frac{8044}{2} = 4022.
   \]
   Since \( s > 2011 \), we have \( s \geq 4022 \).

6. **Conclusion:**
   Therefore, the inequality holds:
   \[
   \sum_{i=1}^{2011} \frac{x_i^2}{x_{i+1} - 1} \geq 8044.
   \]
   Equality holds when \( s = 4022 \), which implies \( x_1 = x_2 = \ldots = x_{2011} = 2 \).

The final answer is \(\boxed{8044}\)