Author: ignougroup

Problem Detail: I would like some hints on how to approach this problem, I know for instance that $TQBF$ is $PSPACE$-$Complete$, so it can solved in poly space and any other $PSPACE$-$Complete$ problems can be log spaced reduced to $TQBF$. I Read More …

Problem Detail: There are plenty of details about carry lookahead adders such as Kogge-Stone, Lander-Fischer, etc. in college CS courses. They are described as “common in the industry”. However, I can’t find any evidence (aside from maybe the Manchester carry chain) Read More …

Problem Detail: The 3SUM problem has two variants. In one variant, there is a single array $S$ of integers, and we have to find three different elements $a,b,c in S$ such that $a+b+c=0$. In another variant, there are are three arrays Read More …

Problem Detail: I am reading Decompositions of Triangle-Dense Graphs by Gupta et al. On page 2, in Definition 1 what is a wedge in a graph? I know what triangle is but I don’t know what wedge is and google isn’t Read More …

Problem Detail: When it comes to the design of algorithms, one often employs the following techniques: Dynamic Programming The Greedy-Strategy Divide-and-Conquer While for the first two methods, there are well-known theoretical foundations, namely the Bellman Optimality Principle and matroid (resp. greedoid) Read More …

Problem Detail: I’ve come across the CYK algorithm and was wondering, as it’s quite old, if it is still relevant today. Is it or an extension of it still being used in compilers (for example), or have other algorithms proven to Read More …