# Show that, unlike the three-dimensional case, there is no restriction on the number of bosons in excited states, and therefore

###### Question:

Consider a two-dimensional non-interacting Bose gas at low temperatures. Show that, unlike the three-dimensional case, there is no restriction on the number of bosons in excited states as $$T \rightarrow 0$$, and therefore there is no necessity for Bose condensation in this case.

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