Stronger Pumping Lemma for Context Free Languages
Hi Math Stack Exchange, Taking a class in automata theory, and having real trouble proving the following strong automata theorem for context free language...
21 Apr 2026 1 READS
Archive: General
![Question about the meaning of finite complement topology. [duplicate]](https://edu.smbbmcl.edu.pk/uploads/question-about-the-meaning-of-finite-complement-topology-duplicate_720.jpg)
Question about the meaning of finite complement topology. [duplicate]
I want to eventually show that the "finite complement topology" is in fact a topology. But first I want to make sure I understand the definition. My book ...
21 Apr 2026 1 READS
Are there any famous/notable mathematicians who have their own YouTube channel?
Are there any famous/notable mathematicians who have their own YouTube channel? I found this amazing video regarding the book. The YouTube channel name is...
21 Apr 2026 1 READS
How do we decide whether to visualize a matrix with its rows or columns?
Should one visualize a matrix by its rows, columns, or both depending on the situation? I see both used and it seems arbitrary. It would be nice if only o...
21 Apr 2026 1 READS
What is exactly the difference between a definition and an axiom?
I am wondering what the difference between a definition and an axiom. Isn't an axiom something what we define to be true? For example, one of the axi...
21 Apr 2026 1 READS
How many different Braille characters can there be?
The Braille system for representing characters was developed in the early 19th century by Louis Braille. Special characters for the blind consist of raise...
21 Apr 2026 1 READS
User Qwertuy - Mathematics Stack Exchange
Q&A for people studying math at any level and professionals in related fields
21 Apr 2026 1 READS
How to integrate $\int{\frac{1}{\cos(x)}}dx$ using the substitution $u=\tan\left(\frac{x}2\right)$?
So far, I've tried out to reformulate: $$\int{\frac{1}{\cos(x)}}dx$$ to: $$\int{\frac{\sin(x)}{\cos(x)\sin(x)}}dx$$ which is basically: $$\int{\frac{...
21 Apr 2026 1 READS
What is the relationship between poisson, gamma, and exponential distribution?
I'm having a hard time understanding the intuitive relationship between these three distributions. I thought that poisson is what you get when you su...
21 Apr 2026 1 READS
Fast way to check if two curves intersect?
Say I had $y = 2x^2 + 4x - 3$ and $4 = x^2 + y^2$ and I wanted to know whether they intersected. I could simultaneously solve them, but that takes time. I...
21 Apr 2026 1 READS
