WorldCat Identities

Macarie, Ioan I.

Overview
Works: 8 works in 15 publications in 1 language and 38 library holdings
Roles: Author
Publication Timeline
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Most widely held works by Ioan I Macarie
Closure properties of stochastic languages by I Macarie( Book )

1 edition published in 1993 in English and held by 6 WorldCat member libraries worldwide

Properties of probabilistic pushdown automata by Ioan I Macarie( Book )

2 editions published in 1994 in English and held by 5 WorldCat member libraries worldwide

Abstract: "Properties of probabilistic as well as 'probabilistic plus nondeterministic' pushdown automata and auxiliary pushdown automata are studied. These models are analogous to their counterparts with nondeterministic and alternating states. Complete characterizations in terms of well-known complexity classes are given for the classes of languages recognized by polynomial time-bounded, logarithmic space-bounded auxiliary pushdown automata with probabilistic states and with 'probabilistic plus nondeterministic' states. Also, complexity lower bounds are given for the classes of languages recognized by these automata with unlimited running time. It follows that, by fixing an appropriate mode of computation, the difference between classes of languages such as P and PSPACE, NL and SAC¹, PL and Diff[subscript>](#SAC¹) is characterized as the difference between the number of stack symbols; that is, whether the stack alphabet contains one versus two distinct symbols."
Space-efficient deterministic simulation of probabilistic automata by Ioan I Macarie( Book )

2 editions published in 1993 in English and held by 5 WorldCat member libraries worldwide

Connections among space-bounded and multihead probabilistic automata by Ioan I Macarie( Book )

2 editions published in 1994 in English and held by 5 WorldCat member libraries worldwide

Properties of multihead two-way probabilistic finite automata by Ioan I Macarie( Book )

2 editions published in 1994 in English and held by 5 WorldCat member libraries worldwide

On the structure of log-space probabilistic complexity classes by Ioan I Macarie( Book )

2 editions published in 1994 in English and held by 4 WorldCat member libraries worldwide

Abstract: "We investigate hiearchical properties and log-space reductions of languages recognized by log-space probabilistic Turing machines, Arthur-Merlin games and Games against Nature with log-space probabilistic verifiers. For each log-space complexity class, we decompose it into a hierarchy based on corresponding multihead two-way finite automata and we (eventually) prove the separation of the hierarchy levels (even over one letter alphabet); furthermore, we show log-space reductions of each log-space complexity class to low levels of its corresponding hierarchy. We find probabilistic (and 'probabilistic+nondeterministic') variants of Savitch's maze threading problem which are log-space complete for PL (and respectively P) and can be recognized by two-head and one-way one-counter finite automata with probabilistic (probabilistic and nondeterministic) states."
Decreasing the bandwidth of a transition matrix by Ioan I Macarie( Book )

2 editions published in 1994 in English and held by 4 WorldCat member libraries worldwide

Abstract: "Adapting the competitions method of Freivalds to the setting of unbounded-error probabilistic computation, we prove that, for any [epsilon] [member of] (0,1], Band-Mat-Inv(n[superscript [epsilon]]) is log-space complete for the class of languages recognized by log-space unbounded-error probabilistic Turing machines (PL). This extends the result of Jung that Band-Mat-Inv(n) is log-space complete for PL, and may open new possibilities for space-efficient deterministic simulation of space-bounded probabilistic Turing machines."
Bits and relative order from residues, space efficiently by Paul Frederick Dietz( Book )

2 editions published in 1993 in English and held by 4 WorldCat member libraries worldwide

 
Audience Level
0
Audience Level
1
  Kids General Special  
Audience level: 0.79 (from 0.75 for Closure pr ... to 0.82 for Properties ...)

Languages
English (15)