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The harmonic mean, \(\left(\frac{1}{n} \sum_{i=1}^n x_i^{-1}\right)^{-1}\). For a matrix, the function is applied over all entries.
harmonic_mean(x)
An '>Expression, vector, or matrix.
An '>Expression representing the harmonic mean of the input.
# NOT RUN { x <- Variable() prob <- Problem(Maximize(harmonic_mean(x)), list(x >= 0, x <= 5)) result <- solve(prob) result$value result$getValue(x) # }
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