Which sorting algorithms are implemented in modern DBMS?

What are some examples of two distinct integers mmm and nnn, such that ϕ(mn)ϕ(mn)phi (mn) equals ϕ(m)ϕ(m)phi (m)ϕ(n)ϕ(n) phi (n). How do I calculate them?

I need to identify groups of users sharing similar interests including time availability. What’s the best Machine Learning algorithm for this purpose?

How do I solve more problems, or close to 10 problems (sorted according to number of users solved), in SPOJ in a week?

What is the complexity of accessing a object in Hashset O(1)?

How do recursive functions work?

What’s the right way to read CLRS (Intro to Algorithms)?

What is the worst case time complexity of finding an element in a sparsely populated hashmap?

What if we used geometric mean instead of arithmetic in binary search algorithm?

Which feature of an extraction algorithm is suitable for bird sound analysis?

What are the parameters of image segmentation algorithms through which their performance can be measured or they can be compared?

How do I know when to use the tree data structure?

Where can I download materials on hacking for beginners?

What is the interpretation of brute force solution to a problem in terms of Turing Machine?

Why/how are the two recurrence relations of the rod cutting problem equivalent?

How does the Lin-Kernighan heuristic works for TSP?

How do I find non-decreasing and non-increasing subranges in an array?

Is there any methodical approach to solve problems that are impossible to solve using your current knowledge?

Is there any solution to the triplet sum problem better than O(n^2)?

How would you improve the autocorrect algorithm?