Problem Detail: This particular language: $$L = { u u^R v ,:, u, v in {0, 1}^+}$$ is giving me a lot of trouble. I highly suspect that its non-regular, considering that ${ u u^R : u in {0, 1}^+}$ is Read More …
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[Solved]: example for weakly fair v.s. strongly fair scheduling in concurrency
Problem Detail: I am having difficult time understanding the difference between weakly fair and strongly fair schedulers. Can someone provide an example and explain how they are different? for reference, here are the definitions I have of each: weakly fair: A Read More …
[Solved]: How to find left-hand side of tape on a Turing Machine?
Problem Detail: I am pretty new to Turing Machines and am trying to figure something out. So let’s say I have a tape with input 0 0 1 0 0 1 The language is twice as many 0’s than 1’s. So Read More …
[Solved]: Are neural networks dynamical systems?
Problem Detail: Dynamical systems are those whose evolution can be described by a rule, evolves with time and is deterministic. In this context can I say that Neural networks have a rule of evolution which is the activation function $f(text{sum of Read More …
[Solved]: Algorithms which are both deterministic and non-deterministic
Problem Detail: I’m just starting my second year in computer science and one of my classes briefly touched upon deterministic vs. non-deterministic algorithms. This got me thinking – is there any use for algorithms which return deterministic output for certain inputs, Read More …
[Solved]: Relation between logspace-uniform circuits and P-uniform circuits
Problem Detail: In the book “Computational complexity” of Barak and Arora, on page 112, they state that: Theorem 6.15: A language has logspace-uniform circuits of polynomial size iff it is in P. The proof of this one is left as an Read More …
[Solved]: Is the following extension of finite state automata studied?
Problem Detail: Consider a finite state machine as usual, but every transition, it can also update an integer counter by adding or subtracting a number. Say, a transition function of the form $delta(q,a) = (p,k)$ moves to the new state $p$, Read More …
[Solved]: Can GDB debug itself?
Problem Detail: Can GDB be run on itself? How or why not? I see something about it http://www.math.utah.edu/docs/info/gdbint_3.html But GDB might not be written in a language that it can debug? Asked By : Dac Saunders Answered By : Dave Clarke Yes, it’s Read More …
[Solved]: Difference between free and global variables
Problem Detail: Is there any difference between free variable and global variable? Or they are just synonyms? In which situations I should use one or another? Asked By : rook Answered By : Gilles They don’t play in the same category. The notion Read More …
[Solved]: Are there any problems in $APX – PTAS$ that are not $APX$-complete?
Problem Detail: I have a question about the structure of the complexity class $APX$. Obviously, unless $P=NP$, no problem in the class $PTAS$ can be $APX$-complete (under the AP-reduction). However, what about the rest of problems in $APX$? Are there any Read More …
