Write a Python function that takes as inputs a vector of values and returns a vector of semivariances, which we will define as the Euclidean distance between each pair of observations: , where x_i and x_j represent different values. Your code should compute and return the semivariance as a vector, with no repetitions (i.e., you can't just use a simple double for-loop because ). There are several possible ways to solve the problem, including a modified double for-loop, or write a separate function.

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