Determinism versus Nondeterminism for Linear Time RAMs with Memory Restrictions
Determinism versus Nondeterminism for Linear Time RAMs with Memory Restrictions
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具有内存限制的线性时间 RAM 的确定性与非确定性
DOI:
10.1006/jcss.2002.1821
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发表时间:
2002
期刊:
影响因子:
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通讯作者:
M. Ajtai
中科院分区:
文献类型:
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作者:
M. Ajtai
Our computational model is a random access machine with n read only input registers each containing c log n bits of information and a read and write memory. We measure the time by the number of accesses to the input registers. We show that for all k there is an e > 0 so that if n is sufficiently large then the elements distinctness problem cannot be solved in time kn with en bits of read and write memory; that is, there is no machine with this value of the parameters which decides whether there are two different input registers whose contents are identical.