User Desmoz - Mathematics Stack Exchange
Q&A for people studying math at any level and professionals in related fields
19 Apr 2026 1 READS
Archive: General
Finding length of line that intersects trapezoid diagonals.
In trapezoid $ABCD,$ base $\overline{AB}$ has length 6, and base $\overline{CD}$ has length 18. A line passes through the intersection of the diagonals, p...
19 Apr 2026 1 READS
What is the difference between discrete and continuous mathematics?
I am studying computer science and this has me absolutely flummoxed. The definition I can find is that discrete data is countable and that continuous is u...
19 Apr 2026 1 READS
Good abstract algebra books for self study
Last semester I picked up an algebra course at my university, which unfortunately was scheduled during my exams of my major (I'm a computer science m...
19 Apr 2026 1 READS
Algebraically closed field with characteristics $0$ versus $\mathbb{C}$
We know that $\mathbb C$ is an algebraically closed field with characteristic $0$. It seems that if a proposition that can be expressed in the language of...
19 Apr 2026 1 READS
Distance between line and a point
Consider the points (1,2,-1) and (2,0,3). (a) Find a vector equation of the line through these points in parametric form. (b) Find the distance between th...
19 Apr 2026 1 READS
What does "saturate" or "saturation" mean in relation to functions?
I am reading: https://www.deeplearningbook.org/contents/mlp.html And the author uses the term saturate a lot in relation to functions. What does that mean...
19 Apr 2026 1 READS
A matrix decomposition problem similar to the CS decomposition
For two column orthonormal $X,Y\in\mathbb{C}^{n\times k},k<n$, prove that there exist unitary $Q\in\mathbb{C}^{n\times n},U,V\in\mathbb{C}^{k\times k}$...
19 Apr 2026 1 READS
Is it Ok to only factor using the box method? Or should I learn the traditional way?
X box factoring method: https://www.youtube.com/watch?v=_Wb_CT-1VN8 The X box seems to be more versatile. I'm starting to get a little paranoid about...
19 Apr 2026 1 READS
![Why are mathematicians still trying to calculate digits of pi? [closed]](https://edu.smbbmcl.edu.pk/uploads/why-are-mathematicians-still-trying-to-calculate-digits-of-pi-closed_720.jpg)
Why are mathematicians still trying to calculate digits of pi? [closed]
Why do mathematicians still try to calculate digits $\pi$? In 2019 Haruka Iwao calculated the world's most accurate value of $\pi$; which included $3...
19 Apr 2026 1 READS
