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Problem Detail: I was going through my book of proof and I find very confusing its definition, so I would like someone to help me in understanding this. The blank tape problem takes a machine and an empty tape and tells Read More …

Problem Detail: I’m working on some exercises regarding graph theory and complexity. Now I’m asked to give an algorithm that computes a transposed graph of $G$, $G^T$ given the adjacency matrix of $G$. So basically I just have to give an Read More …

Problem Detail: I thought this would be the best place for a question like this. Anyway, I was wondering what minor would go well with a Computer Science degree. I was considering a minor in math but I am not entirely Read More …

Problem Detail: What are the major differences between Deterministic Push Down Automata and Non-deterministic Push Down Automata? Which one is faster and how? Also what are the drawbacks of DPDA with respect to NPDA. Can anyone quote an example and explain Read More …

Problem Detail: Let me start off by noting this is a homework problem, please provide only advice and related observations, NO DIRECT ANSWERS please. With that said, here is the problem I am looking at: Let HALF-CLIQUE = { $langle G Read More …

Problem Detail: I was looking over this question requesting an algorithm to generate all permutations of a given string. A comment in the answer caught my eye: It might seem that it can take O(n) time per permutation, but if you Read More …

Problem Detail: I would like to find the height of a d-ary heap. Assuming you have an Array that starts indexing at $1$ we have the following: The parent of a node $i$ is given by: $leftlfloorfrac{i+1}{d}rightrfloor$ The $d$ children of Read More …

Problem Detail: Clearly there aren’t any undecidable problems in NP. However, according to Wikipedia: NP is the set of all decision problems for which the instances where the answer is “yes” have [.. proofs that are] verifiable in polynomial time by Read More …

Problem Detail: I am interested in the time complexity of a compiler. Clearly this is a very complicated question as there are many compilers, compiler options and variables to consider. Specifically, I am interested in LLVM but would be interested in Read More …

Problem Detail: I have heard the word “hash” being used in different contexts (all within the world of computing) with different meanings. For example, in the book Learn Python the Hard Way, in the chapter on dictionaries it is said “Python Read More …