A detail in the proof of Auslander-Buchsbaum Theorem
I'm trying to understand the proof of a theorem (Auslander-Buchsbaum) which says that given a local ring $(R,m)$, where $m$ is the maximal ideal, and...
04 Apr 2026 1 READS
No “Performance” option in “Power Mode” in Ubuntu 21.04
I have Ubuntu 21.04 installed on my laptop. There is supposed to be a “Performance” option in Settings > Power Mode, but I am only given the options fo...
04 Apr 2026 1 READS
Set up sudo so that a particular common user can edit /etc/fstab
How can I set up sudo so that a particular common user can edit /etc/fstab? I've thought to edit /etc/sudoers.d file to do this, but how do we edit /...
04 Apr 2026 1 READS
Why (Zn,*), integers modulo n under multiplication, is a group if and only if n is prime?
Is it true that $(\Bbb Z_n,\cdot)$, integers modulo $n$ under multiplication, is a group if and only if $n$ is prime? If it's true, why? How can I pr...
04 Apr 2026 1 READS
Are all polynomial expressions an algebraic expression.
I mean to ask that, real numbers can be written in the form of constant polynomials like, 4x^0, 2x^0 etc. If all polynomial expressions are algebraic expr...
04 Apr 2026 1 READS
How do I deal with "undefined reference to dlopen" errors while compiling and using OpenFST on Ubuntu?
Trying to compile and use OpenFST on Ubuntu 13.10 leads to link errors like "undefined references to dlopen". How does one fix this? Searching online sugg...
04 Apr 2026 0 READS
![PhotoShop alternative for Ubuntu [duplicate]](https://edu.smbbmcl.edu.pk/uploads/photoshop-alternative-for-ubuntu-duplicate_720.jpg)
PhotoShop alternative for Ubuntu [duplicate]
Possible Duplicate: Alternative to Photoshop or Paint.NET Hello. I am working in Ubuntu. I want to do some editing and drawing. On Windows I was using Ado...
04 Apr 2026 0 READS
![How to solve error communicating to TPM chip [closed]](https://edu.smbbmcl.edu.pk/uploads/how-to-solve-error-communicating-to-tpm-chip-closed_720.jpg)
How to solve error communicating to TPM chip [closed]
I want to know how to enable TPM I found the TPM settings in the bios by I am not able to click.
04 Apr 2026 0 READS
apt --fix-broken install not working
I am using Ubuntu 20.04. When I execute the command: sudo apt-get install build-essential I get the output: Reading package lists... Done Building depende...
04 Apr 2026 0 READS
How do I automate sending a file to an FTP server with a script?
I need to take make a script that takes a particular log file in /var/log/ and puts it somewhere where I can easily get it (most likely a web or FTP serve...
04 Apr 2026 0 READS
