# Number of particles in a microcanonical ensemble

Is it always assumed that, in a microcanonical ensemble, the number of particles is $N \gg 1$ ?

If no, are all the theorems related to the microcanonical description true even if the number of particles is small ?

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Why do you emphasize the microcanonical ensemble? Is not it a more general question of statistical description applicability in physics? –  freude Apr 25 at 15:06
I already know that a canonical ensemble can be microscopic (the heat bath, however, should be macroscopic). –  Arnaud Apr 25 at 15:22
Which "theorems" are you referring to? –  joshphysics Apr 25 at 15:35