Dec 21, 2025 · Q&A for students, researchers and practitioners of computer science

Jan 12, 2016 · Both algorithms are DIT, but the main difference is in memory access patern. Cooley-Tukey - the most popular form of transformation from DFT to FFT comes from cache awareness, …

May 15, 2023 · Let M = Q, Σ, Γ,δM,q0,qacc,qrej M = Q, Σ, Γ, δ M, q 0, q a c c, q r e j be a TM whose reading head can only move to the right. Prove that L(M) ∈ REG L (M) ∈ R E G. For simplicity you …

Mar 31, 2016 · I'm curious, how could I know that P (polynomial time complexity class) is not equal to deterministic linear space complexity class? Is there some proof? Or should I find some algorithm …

Mar 7, 2023 · Is the answer O(h) or Ω(h) for f+g? My professor says its Ω(h), but I can't get it.

Oct 8, 2023 · According to this article, we have the following: The device controller gets data from a connected system device and temporarily saves such data in a special purpose register inside the …

Mar 12, 2023 · The below text is taken from the book : Operating Systems: Internals and Design Principles by William Stallings, 8th edition, page 68. Scheduling and Resource Management A key …

May 30, 2015 · "In computability theory, a Turing reduction from a problem A to a problem B, is a reduction which solves A, assuming the solution to B is already known". You assume decidability of L …

Sep 9, 2015 · "should I perhaps" -- yes, definitely! All constructions in the pipeline Regular Expression --> NFA --> DFA --> Inverted DFA are probably available from lecture/literature, hence you have to …

Oct 23, 2019 · Pushdown automata are nondeterministic. Therefore you need to simulate all possible execution paths. The problem is that since PDAs support ϵ ϵ -moves, there could potentially be …