随机算子的任意门电路
Circuits with arbitrary gates for random operators
摘要:
我们考虑计算n-算子f:{0,1}^n --> {0,1}^n的布尔电路。作为门,我们允许任意的布尔函数;门的扇入和扇出都不受限制。一个算子是线性的,如果它计算n个线性形式,也就是说,计算GF(2)上的矩阵向量积y=Ax。本文证明了在任意电路中存在需要约n^2根导线的n-算子,在深度为2的电路中存在需要约n^2/ \log n根导线的线性n-算子,如果所有输出门或中间层上的所有门都是线性的.
英文摘要:
We consider boolean circuits computing n-operators f:{0,1}^n --> {0,1}^n. As gates we allow arbitrary boolean functions; neither fanin nor fanout of gates is restricted. An operator is linear if it computes n linear forms, that is, computes a matrix-vector product y=Ax over GF(2). We prove the existence of n-operators requiring about n^2 wires in any circuit, and linear n-operators requiring about n^2/\log n wires in depth-2 circuits, if either all output gates or all gates on the middle layer are linear.
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