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JAPLL
2008
96views more  JAPLL 2008»
13 years 11 months ago
Simulating Turing machines on Maurer machines
Maurer machines are much closer to real computers than Turing machines. Computer instructions play a prominent part in Maurer machines. We show a straightforward way to simulate Tu...
Jan A. Bergstra, C. A. Middelburg
FUIN
2007
89views more  FUIN 2007»
13 years 11 months ago
Maurer Computers with Single-Thread Control
We present the development of a theory of stored threads and their execution. The work builds upon Maurer’s theory of computer instructions and the thread algebra of Bergstra et ...
Jan A. Bergstra, C. A. Middelburg
FOCS
2006
IEEE
14 years 5 months ago
On the time complexity of 2-tag systems and small universal Turing machines
We show that 2-tag systems efficiently simulate Turing machines. As a corollary we find that the small universal Turing machines of Rogozhin, Minsky and others simulate Turing ma...
Damien Woods, Turlough Neary
TCS
2012
12 years 6 months ago
Improved simulation of nondeterministic Turing machines
Abstract. The standard simulation of a nondeterministic Turing machine (NTM) by a deterministic one essentially searches a large boundeddegree graph whose size is exponential in th...
Subrahmanyam Kalyanasundaram, Richard J. Lipton, K...