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Abstract:
In this paper we analyse the expected depth of random circuits of fixed fanin f
. Such circuits are built a gate at a time, with the f inputs of each new gate
being chosen randomly from among the previously added gates. The depth of the
new gate is defined to be one more than the maximal depth of its input gates.
We show that the expected depth of a random circuit with n gates is bounded
from above by ef ln n and from below by 2.04 … f ln n.
