Fig. 1.

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Observational claims of IMBH detection in the (μ = MIMBH/⟨m⟩, α = MIMBH/M) plane, shown as black diamonds. Any technique (most notably the direct N-body one) that cannot simulate more than a given number of particles N must trade α for μ at any given N, being unable to access the top left region, which is shown shaded in orange for a typical value of N for direct N-body codes currently available, N = 106. As a reference, N = 105 is also shown as a dashed line.
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