Guen Prawiroatmodjo @guenp@physics.social

I came across this nice integerological fact:

Define \(\operatorname{ord}_p(n)\) to be the power of \(p\) in the prime factorisation of \(n\).

Then

\[ \sum_{k=1}^n\gcd(n,k) = \prod_{p|n} \left(1+\left(1-\frac{1}{p}\right) \cdot \operatorname{ord}_p(n)\right) \]

I don't know why you'd want to do this, and all the references I've found to it talk about it as a special case of some more general identities, but for some reason it appealed to me.

I'm a graduate student in physics. My recent effort is on understanding the solutions of \(\partial_t^2 \psi - \nabla^2\psi + \psi(\psi\psi^* - \psi_0(t)\psi_0^*(t))=0\). But of course I'm open to be distracted by other good maths. #introduction

My favorite thing about Mastodon so far is that all of a sudden I have posts about history, archaeology, astrophysics etc in my timeline because even though I follow mostly the same people here as tweeter everyone branched out once they got here and started boosting cool people they ran into here.

First batch of Home Assistant Skyconnect is almost ready to be shipped 😀

RT @GeoPythonConf
We're happy to announce GeoPython 2023, March 06-08 in Basel, Switzerland - the conference for #Python and #Geo
Call for Speakers is now open: https://2023.geopython.net
#python #geospatial

hey #datascience #machinelearning peeps! could you please recommend a Mastodon instance for a new tooter interested in ML and data science?

Asking for a friend! thanks!

#recommend #newuser #mastodonmigration

Possibly the most frightening talent of the brown bear is an uncanny ability to blend seamlessly into the environment in an almost chameleon-like manner, allowing them to easily surprise their unsuspecting prey.

In case people haven't seen this yet, there's an "Academics on Mastodon" list on GitHub here: https://nathanlesage.github.io/academics-on-mastodon/
#Academia #Mastodon #Tips

I'm now aware of 4 tools that can help you find people on Mastodon, particularly people you followed on Twitter. Are there any others?
• Social Search: https://search.noc.social
• Twitodon: https://twitodon.com
• Debirdify: https://pruvisto.org/debirdify/
• Fedifinder: http://fedifinder.glitch.me

In Episode 3, we talked to Dr Lídia del Rio (@azul) about #QuantumInformation and what it took to co-found the community-driven scientific journal "Quantum".

Take a listen to the episode if you'd like to know more!

https://youtu.be/zNpT-WwyUUI

#QuantumInformation #QuantumThermodynamics #QuantumJournal #Quantum #insideQuantum #QuantumTechnology #QuantumComputing #Publishing #AcademicPublishing

In Episode 2, we talked to Dr Philippe Faist (@phfaist) about #errorcorrection and #complexity.

How can we make the most of noisy, current-generation quantum computers, and just what is the Error Correction Zoo? Take a listen to find out!

https://youtu.be/7gHdvuuszQE

#QEC #ErrorCorrection #QuantumErrorCorrection #NISQ #QuantumComputing #QuantumTechnology #QuantumInformation #insideQuantum

Posts on here don't go viral, they go fungal, because the Fediverse is like the mycelium of mushrooms.

It's a shame that so many people are joining mastodon[.]social and having a bad experience. Unless you enjoy consuming the internet from a fire hose, you're gonna have a bad time. Moderation there is likely not going to align with your needs.
I am fortunate to have been following @nova on Twitter and saw her posting about #hachyderm, such that I was able to migrate to hachyderm.io after only 12 days of joining the fediverse. Even though it's grown to >20k users, the local feed is still readable!

Trying this Mastodon thing by promoting a new preprint from the group on qubit cloaking. Check it out and let me know how it works for you in the lab! https://arxiv.org/abs/2211.05758

People don't realize that Reddit *used* to be open source. https://github.com/reddit-archive/reddit