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TEST Test TEST TEST TEST 123456789101112131415161718192021222324252627282930$$H=-\sum_{i=1}^N (\sigma_{i}^x \sigma_{i+1}^x+g \sigma_{i}^z)$$$$f(n) = \begin{cases} \frac{n}{2}, & \text{if } n\text{ is even} \\ 3n+1, & \text{if } n\text{ is odd} \end{cases}$$$$\begin{aligned}\nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\ ...
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