Mathstodon

5 posts4 participants0 posts today

Suat AyözI'll be posting the questions from AMS 2025 Daily Epsilon of Math Calendar daily from now on. I should have started earlier (doing it on Blue sky for some time). Hope it will be of interestHere's the question for April 15th. For those unfamiliar with the calendar, the answer is always the day of the month. Looking for imaginative solutions is the aim. <a href="https://mathstodon.xyz/tags/mathstodon" class="mention hashtag" rel="tag">#mathstodon</a> <a href="https://mathstodon.xyz/tags/math" class="mention hashtag" rel="tag">#math</a> <a href="https://mathstodon.xyz/tags/maths" class="mention hashtag" rel="tag">#maths</a> <a href="https://mathstodon.xyz/tags/mathematics" class="mention hashtag" rel="tag">#mathematics</a> <a href="https://mathstodon.xyz/tags/MathsToday" class="mention hashtag" rel="tag">#MathsToday</a>

Suat AyözI'll be posting the questions from AMS 2025 Daily Epsilon of Math Calendar daily from now on. I should have started earlier (doing it on Blue sky for some time). Hope it will be of interestHere's the question for April 14th. For those unfamiliar with the calendar, the answer is always the day of the month. Looking for imaginative solutions is the aim. <a href="https://mathstodon.xyz/tags/mathstodon" class="mention hashtag" rel="tag">#mathstodon</a> <a href="https://mathstodon.xyz/tags/math" class="mention hashtag" rel="tag">#math</a> <a href="https://mathstodon.xyz/tags/maths" class="mention hashtag" rel="tag">#maths</a> <a href="https://mathstodon.xyz/tags/mathematics" class="mention hashtag" rel="tag">#mathematics</a> <a href="https://mathstodon.xyz/tags/MathsToday" class="mention hashtag" rel="tag">#MathsToday</a>

Suat AyözI'll be posting the questions from AMS 2025 Daily Epsilon of Math Calendar daily from now on. I should have started earlier (doing it on Blue sky for some time). Hope it will be of interestHere's the question for April 13th. For those unfamiliar with the calendar, the answer is always the day of the month. Looking for imaginative solutions is the aim. <a href="https://mathstodon.xyz/tags/mathstodon" class="mention hashtag" rel="tag">#mathstodon</a> <a href="https://mathstodon.xyz/tags/math" class="mention hashtag" rel="tag">#math</a> <a href="https://mathstodon.xyz/tags/maths" class="mention hashtag" rel="tag">#maths</a> <a href="https://mathstodon.xyz/tags/mathematics" class="mention hashtag" rel="tag">#mathematics</a> <a href="https://mathstodon.xyz/tags/MathsToday" class="mention hashtag" rel="tag">#MathsToday</a>

geraldewBut I'd still like to find an SQL method for doing the multivariate distance.I don't need it to be strictly in "pure" SQL as the goal is just to avoid the callout, so any use of features custom to Teradata SQL will be good enough.I see Teradata has a table function for making a covariance matrix, so hopefully I just need clarity over how to take it from there.But can I find time or enthusiasm to wade through enough "how to calculate" tutorials to find my solution path? <a href="https://fosstodon.org/tags/SQL" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SQL</a> <a href="https://fosstodon.org/tags/mathstodon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#mathstodon</a>

geraldewBack on tech matters, lately I've been revisiting the Mahalanobis distance.I had an intention ten years ago to seek an SQL method for deriving it, but it never became pressing enough, and the process using it - via an external call out - was only once once annually.Returning to the same process ten years later, I've dug a little deeper and found that the callout had only been doing on each separate "variable" - and was thus equivalent to doing each as a simple "z-score". <a href="https://fosstodon.org/tags/SQL" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SQL</a> <a href="https://fosstodon.org/tags/mathstodon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#mathstodon</a>

Tom de JongSearch and @-resolution appear to be not working on <a href="https://mathstodon.xyz/tags/mathstodon" class="mention hashtag" rel="tag">#mathstodon</a>. Am I the only one with this issue?

HoldMyTypeam i the only one who found search on <a href="https://mathstodon.xyz/tags/mathstodon" class="mention hashtag" rel="tag">#mathstodon</a> extremely slow recently ?

Pachli# <a href="https://mastodon.social/tags/Pachli" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Pachli</a> 2.11.0 is released## New features include- Support translation throughout the app - Experimental Markdown support - Content filters default to all contexts## Fixes include:- Toot button accessibility - Grammar fixes - Report UI updates - Content filter updates - Fewer crashes## Updated translations- Finnish, Indonesian, Irish, Latvian, Norwegian Nynorsk, Polish, Slovak, SpanishMore details at <a href="https://pachli.app/pachli/2025/03/31/2.11.0-release.html" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://pachli.app/pachli/2025/03/31/2.11.0-release.html</a>.<a href="https://mastodon.social/tags/mastodev" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#mastodev</a> <a href="https://mastodon.social/tags/androiddev" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#androiddev</a> <a href="https://mastodon.social/tags/markdown" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#markdown</a> <a href="https://mastodon.social/tags/mathstodon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#mathstodon</a>

HoldMyTypeHey i poseted an image with question and my post is lost Wtf <a href="https://mathstodon.xyz/tags/mathstodon" class="mention hashtag" rel="tag">#mathstodon</a> ? Nontheless that ll be my new dp now

Pustam | पुस्तम | পুস্তম🇳🇵The Fourier Transform is a mathematical operation that transforms a function of time (or space) into a function of frequency. It decomposes a complex signal into its constituent sinusoidal components, each with a specific frequency, amplitude, and phase. This is particularly useful in many fields, such as signal processing, physics, and engineering, because it allows for analysing the frequency characteristics of signals. The Fourier Transform provides a bridge between the time and frequency domains, enabling the analysis and manipulation of signals in more intuitive and computationally efficient ways. The result of applying a Fourier Transform is often represented as a spectrum, showing how much of each frequency is present in the original signal.\[\Large\boxed{\boxed{\widehat{f}(\xi) = \int_{-\infty}^{\infty} f(x)\ e^{-i 2\pi \xi x}\,\mathrm dx, \quad \forall\xi \in \mathbb{R}.}}\]Inverse Fourier Transform: \[\Large\boxed{\boxed{ f(x) = \int_{-\infty}^{\infty} \widehat f(\xi)\ e^{i 2 \pi \xi x}\,\mathrm d\xi,\quad \forall x \in \mathbb R.}}\] The equation allows us to listen to mp3s today. Digital Music Couldn’t Exist Without the Fourier Transform: <a href="http://bit.ly/22kbNfi" target="_blank" rel="nofollow noopener noreferrer" translate="no">http://bit.ly/22kbNfi</a><a href="https://mathstodon.xyz/tags/Fourier" class="mention hashtag" rel="tag">#Fourier</a> <a href="https://mathstodon.xyz/tags/FourierTransform" class="mention hashtag" rel="tag">#FourierTransform</a> <a href="https://mathstodon.xyz/tags/Transform" class="mention hashtag" rel="tag">#Transform</a> <a href="https://mathstodon.xyz/tags/Time" class="mention hashtag" rel="tag">#Time</a> <a href="https://mathstodon.xyz/tags/Frequency" class="mention hashtag" rel="tag">#Frequency</a> <a href="https://mathstodon.xyz/tags/Space" class="mention hashtag" rel="tag">#Space</a> <a href="https://mathstodon.xyz/tags/TimeDomain" class="mention hashtag" rel="tag">#TimeDomain</a> <a href="https://mathstodon.xyz/tags/FrequencyDomain" class="mention hashtag" rel="tag">#FrequencyDomain</a> <a href="https://mathstodon.xyz/tags/Wavenumber" class="mention hashtag" rel="tag">#Wavenumber</a> <a href="https://mathstodon.xyz/tags/WavenumberDomain" class="mention hashtag" rel="tag">#WavenumberDomain</a> <a href="https://mathstodon.xyz/tags/Function" class="mention hashtag" rel="tag">#Function</a> <a href="https://mathstodon.xyz/tags/Math" class="mention hashtag" rel="tag">#Math</a> <a href="https://mathstodon.xyz/tags/Maths" class="mention hashtag" rel="tag">#Maths</a> <a href="https://mathstodon.xyz/tags/JosephFourier" class="mention hashtag" rel="tag">#JosephFourier</a> <a href="https://mathstodon.xyz/tags/Signal" class="mention hashtag" rel="tag">#Signal</a> <a href="https://mathstodon.xyz/tags/Signals" class="mention hashtag" rel="tag">#Signals</a> <a href="https://mathstodon.xyz/tags/FT" class="mention hashtag" rel="tag">#FT</a> <a href="https://mathstodon.xyz/tags/IFT" class="mention hashtag" rel="tag">#IFT</a> <a href="https://mathstodon.xyz/tags/DFT" class="mention hashtag" rel="tag">#DFT</a> <a href="https://mathstodon.xyz/tags/FFT" class="mention hashtag" rel="tag">#FFT</a> <a href="https://mathstodon.xyz/tags/Physics" class="mention hashtag" rel="tag">#Physics</a> <a href="https://mathstodon.xyz/tags/SignalProcessing" class="mention hashtag" rel="tag">#SignalProcessing</a> <a href="https://mathstodon.xyz/tags/Engineering" class="mention hashtag" rel="tag">#Engineering</a> <a href="https://mathstodon.xyz/tags/Analysis" class="mention hashtag" rel="tag">#Analysis</a> <a href="https://mathstodon.xyz/tags/Computing" class="mention hashtag" rel="tag">#Computing</a> <a href="https://mathstodon.xyz/tags/Computation" class="mention hashtag" rel="tag">#Computation</a> <a href="https://mathstodon.xyz/tags/Operation" class="mention hashtag" rel="tag">#Operation</a> <a href="https://mathstodon.xyz/tags/ComplexSignal" class="mention hashtag" rel="tag">#ComplexSignal</a> <a href="https://mathstodon.xyz/tags/Sinusoidal" class="mention hashtag" rel="tag">#Sinusoidal</a> <a href="https://mathstodon.xyz/tags/Amplitude" class="mention hashtag" rel="tag">#Amplitude</a> <a href="https://mathstodon.xyz/tags/Phase" class="mention hashtag" rel="tag">#Phase</a> <a href="https://mathstodon.xyz/tags/Spectra" class="mention hashtag" rel="tag">#Spectra</a> <a href="https://mathstodon.xyz/tags/Spectrum" class="mention hashtag" rel="tag">#Spectrum</a> <a href="https://mathstodon.xyz/tags/Pustam" class="mention hashtag" rel="tag">#Pustam</a> <a href="https://mathstodon.xyz/tags/Raut" class="mention hashtag" rel="tag">#Raut</a> <a href="https://mathstodon.xyz/tags/PustamRaut" class="mention hashtag" rel="tag">#PustamRaut</a> <a href="https://mathstodon.xyz/tags/EGR" class="mention hashtag" rel="tag">#EGR</a> <a href="https://mathstodon.xyz/tags/Mathstodon" class="mention hashtag" rel="tag">#Mathstodon</a> <a href="https://mathstodon.xyz/tags/Mastodon" class="mention hashtag" rel="tag">#Mastodon</a> <a href="https://mathstodon.xyz/tags/GeoFlow" class="mention hashtag" rel="tag">#GeoFlow</a> <a href="https://mathstodon.xyz/tags/SpectralMethod" class="mention hashtag" rel="tag">#SpectralMethod</a>

Furqan ShahYes it is 3.14! Happy Pi Day! 🎉 🥳<a href="https://mstdn.science/tags/Maths" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Maths</a> <a href="https://mstdn.science/tags/Pi" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Pi</a> <a href="https://mstdn.science/tags/Numbers" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Numbers</a> <a href="https://mstdn.science/tags/MathIsFun" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#MathIsFun</a> <a href="https://mstdn.science/tags/STEM" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#STEM</a> <a href="https://mstdn.science/tags/PiDay" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PiDay</a> <a href="https://mstdn.science/tags/HappyPiDay" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#HappyPiDay</a> <a href="https://mstdn.science/tags/March14" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#March14</a> <a href="https://mstdn.science/tags/March14th" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#March14th</a> <a href="https://mstdn.science/tags/Mathstodon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Mathstodon</a>

Reymond AguinaldoHappy <a href="https://mastodon.social/tags/PiDay" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PiDay</a> to all my fellow earthlings! 🌀 Don't forget to eat some pie today, or… well, let’s just say the circle of life might close in on you. And trust me, you don’t want to find out what happens when you divide by zero. So grab a slice — your survival might depend on it. 🥧👀<a href="https://mastodon.social/tags/Pi" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Pi</a> <a href="https://mastodon.social/tags/Math" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Math</a> <a href="https://mastodon.social/tags/Mathematics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Mathematics</a> <a href="https://mastodon.social/tags/Mathstodon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Mathstodon</a> <a href="https://mastodon.social/tags/Maths" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Maths</a>

Charlotte Aten<a href="https://mastodon.online/@jayalane" class="u-url mention">@jayalane</a> <a href="https://pixelfed.social/onipa" class="u-url mention">@onipa</a> The only <a href="https://mathstodon.xyz/tags/TexLateX" class="mention hashtag" rel="tag">#TexLateX</a> packages I used were xifthen and graphicx. I overrode the logarithm command, with some examples at the bottom. I'm sure there's an elegant way to handle the spacing when including the base in this notation, but at the moment I have a kludge where I insert negative space with \mkern-10mu in order to make it look correct.This will not look correct if you're on <a href="https://mathstodon.xyz/tags/Mathstodon" class="mention hashtag" rel="tag">#Mathstodon</a> or any server with latex rendering. I'm not sure if there's a way to turn the formatting off in order for you to see just the source by default.\documentclass{amsart} \usepackage{graphicx, xifthen}\providecommand{\flip}[1]{\scalebox{1}[-1]{\(#1\)}}\renewcommand{\log}[2][]{ \ifthenelse{\isempty{#1}}{ \flip{\sqrt{\flip{#2}}} }{ {}_{#1}\mkern-10mu\flip{\sqrt{\flip{#2}}}} }\begin{document} \[ (\sqrt{x})^2=x=\sqrt{x^2} \] \[ e^{\left(\log{x}\right)}=x=\log{e^x} \] \[ e^{\left(\log[e]{x}\right)}=x=\log[e]{e^x} \] \[ \log{xy}=\log{x}+\log{y} \] \[ \log{x^y}=y\log{x} \] \end{document}

n-gonsReminder: you canhelp mathstodon.xyz to keep the lights on, it a fabulous instance: <a href="https://ko-fi.com/mathstodon" target="_blank" rel="nofollow noopener noreferrer" translate="no">https://ko-fi.com/mathstodon</a> - there's even a leaderbord, maybe YOU can kick me out of the top ten :)<a href="https://mathstodon.xyz/tags/kofi" class="mention hashtag" rel="tag">#kofi</a> <a href="https://mathstodon.xyz/tags/mathstodon" class="mention hashtag" rel="tag">#mathstodon</a> <a href="https://mathstodon.xyz/tags/mastodon" class="mention hashtag" rel="tag">#mastodon</a>

xannaWhich is smaller?<a href="https://mastodon.ie/tags/mathstodon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#mathstodon</a> <a href="https://mastodon.ie/tags/math" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#math</a>

JenniferLLawson<a href="https://www.nytimes.com/interactive/2025/03/01/business/trump-stock-market.html" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.nytimes.com/interactive/2025/03/01/business/trump-stock-market.html</a> <a href="https://newsmast.social/tags/mathematics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#mathematics</a> <a href="https://newsmast.social/tags/math" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#math</a> <a href="https://newsmast.social/tags/mathstodon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#mathstodon</a>

amen zwa, esq.I don’t know mates, should we shun discussing <a href="https://mathstodon.xyz/tags/American" class="mention hashtag" rel="tag">#American</a> <a href="https://mathstodon.xyz/tags/politics" class="mention hashtag" rel="tag">#politics</a> on <a href="https://mathstodon.xyz/tags/MathsTodon" class="mention hashtag" rel="tag">#MathsTodon</a>? Besides, we won’t be losing much, because what we have now is not really politics, but a cult.

Attie GrandeI'm looking for some pointers...I have a vector in 3D space. I want to be able to manipulate its direction based on input pan and tilt angles... Importantly I'd like to be able to give these angles as absolute (i.e: from "up") or relative (i.e: from the current direction).I have a working solution, but I suspect there's a more efficient way to do this. I had a stab with Quaternions, but I couldn't get the tilt to behave like it would on a gimble.Any ideas? 🧮<a href="https://chaos.social/tags/maths" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#maths</a> <a href="https://chaos.social/tags/mathstodon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#mathstodon</a> <a href="https://chaos.social/tags/embedded" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#embedded</a>

JenniferLLawson<a href="https://jenniferleelawson.blogspot.com/2024/12/cantors-theorem-and-problem-of-infinity_38.html" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://jenniferleelawson.blogspot.com/2024/12/cantors-theorem-and-problem-of-infinity_38.html</a> <a href="https://newsmast.social/tags/mathematics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#mathematics</a> <a href="https://newsmast.social/tags/math" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#math</a> <a href="https://newsmast.social/tags/mathstodon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#mathstodon</a>

JenniferLLawson<a href="https://www.defense.gov/News/Advisories/Advisory/Article/4076184/secretary-of-defense-pete-hegseth-to-travel-to-guantanamo-bay/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.defense.gov/News/Advisories/Advisory/Article/4076184/secretary-of-defense-pete-hegseth-to-travel-to-guantanamo-bay/</a> <a href="https://newsmast.social/tags/mathematics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#mathematics</a> <a href="https://newsmast.social/tags/math" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#math</a> <a href="https://newsmast.social/tags/mathstodon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#mathstodon</a>

Recent searches

Search options

Administered by:

Server stats:

#mathstodon