@physbuzz.bsky.social
If you're given only twelve 1 ohm resistors but you need a circuit with an equivalent resistance of pi (approximated as closely as possible), and you have to use all of the resistors (no shorting or leaving them out), here the ways to get 22/7 ohms (which is the best you can do). #math #circuits
November 2, 2025 at 11:14 AM
Twitchcon recap: bridge
October 21, 2025 at 3:47 PM
Twitchcon recap: bridge
Maybe a bit ambitious before bed... Still work to be done to get it in terms of a strict quadratic programming problem (remove the "forall"). But this is what it looks like in terms of a_3, b_3, pretty ugly. On the wiki for quadratic programming, this gives Q and c but not sufficient A or b.
September 28, 2025 at 3:55 AM
Maybe a bit ambitious before bed... Still work to be done to get it in terms of a strict quadratic programming problem (remove the "forall"). But this is what it looks like in terms of a_3, b_3, pretty ugly. On the wiki for quadratic programming, this gives Q and c but not sufficient A or b.
Recently have been quite fond of this guy turning any rational generating function into its sequence of coefficients, using the stream processing ideas in the book SICP. It's nice that it's only like 35 lines of js and is totally general.
September 25, 2025 at 3:54 AM
Recently have been quite fond of this guy turning any rational generating function into its sequence of coefficients, using the stream processing ideas in the book SICP. It's nice that it's only like 35 lines of js and is totally general.
I'd love to see this zooming into 1/phi! ;)
September 14, 2025 at 12:59 PM
I'd love to see this zooming into 1/phi! ;)
Anyone post #math challenges on here? This integral (said to be due to Joseph Bertrand) posted by ChetuyaGamma on the other site hooked me. (I think integrating via contour is consider the coward's way out, but I like the wiggly lines okay?)
![integral of ArcTan[x/a]ArcTan[x/b]/x^2 dx from 0 to infinity](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:wfval2ke6je4eteos4gmokmc/bafkreifdibtzne75vw7qmighkinqwftcd3xevywxpfn35cyhmaeujksaua@jpeg)
September 14, 2025 at 12:50 PM
Anyone post #math challenges on here? This integral (said to be due to Joseph Bertrand) posted by ChetuyaGamma on the other site hooked me. (I think integrating via contour is consider the coward's way out, but I like the wiggly lines okay?)
Had to pause the latest #3blue1brown video after the 10 seconds to try to solve it myself.
Given an n cube, how many unique connected partial n cubes can we construct out of (n-k) faces? (This is rhetorical, I'm trying it and will try to bumble my way through the computations)
Given an n cube, how many unique connected partial n cubes can we construct out of (n-k) faces? (This is rhetorical, I'm trying it and will try to bumble my way through the computations)
September 7, 2025 at 9:00 PM
Had to pause the latest #3blue1brown video after the 10 seconds to try to solve it myself.
Given an n cube, how many unique connected partial n cubes can we construct out of (n-k) faces? (This is rhetorical, I'm trying it and will try to bumble my way through the computations)
Given an n cube, how many unique connected partial n cubes can we construct out of (n-k) faces? (This is rhetorical, I'm trying it and will try to bumble my way through the computations)
Wait you're telling me a math mathed this math? (SICP problem 3.69 solution) physbuzz.github.io/sicp/ch3/not...
September 7, 2025 at 7:35 AM
Wait you're telling me a math mathed this math? (SICP problem 3.69 solution) physbuzz.github.io/sicp/ch3/not...
Hey um anyone have the largest prime factor of 67^67-1 laying around?
August 24, 2025 at 6:17 AM
Hey um anyone have the largest prime factor of 67^67-1 laying around?
Thanks @countgrimhart.bsky.social for the amazing art!
Cooking up a character for some stream and video projects (she got bored in the cultist lobby and started scribbling e-γ scattering formulas on her cloak. They didn't have any spares so now she's stuck with it...)
Cooking up a character for some stream and video projects (she got bored in the cultist lobby and started scribbling e-γ scattering formulas on her cloak. They didn't have any spares so now she's stuck with it...)
July 31, 2025 at 4:27 AM
Thanks @countgrimhart.bsky.social for the amazing art!
Cooking up a character for some stream and video projects (she got bored in the cultist lobby and started scribbling e-γ scattering formulas on her cloak. They didn't have any spares so now she's stuck with it...)
Cooking up a character for some stream and video projects (she got bored in the cultist lobby and started scribbling e-γ scattering formulas on her cloak. They didn't have any spares so now she's stuck with it...)
Discussing fractals in Mathematica on Twitch in 20 minutes! With Slim from AcademyOfUselessIdeas.
We're winging it  No clue if we're going to end up on IFSes or Mandelbrot or stochastic processes or box counting dimension or [...]
twitch.tv/physbuzz and drop twitch.tv/academyofuse... a follow!
We're winging it  No clue if we're going to end up on IFSes or Mandelbrot or stochastic processes or box counting dimension or [...]
twitch.tv/physbuzz and drop twitch.tv/academyofuse... a follow!
July 26, 2025 at 3:37 PM
Discussing fractals in Mathematica on Twitch in 20 minutes! With Slim from AcademyOfUselessIdeas.
We're winging it  No clue if we're going to end up on IFSes or Mandelbrot or stochastic processes or box counting dimension or [...]
twitch.tv/physbuzz and drop twitch.tv/academyofuse... a follow!
We're winging it  No clue if we're going to end up on IFSes or Mandelbrot or stochastic processes or box counting dimension or [...]
twitch.tv/physbuzz and drop twitch.tv/academyofuse... a follow!
I have a lot of people to thank for my journey, but I have to say the minimal polynomials of cos(n pi/m) made me into the man I am today. Well no, but can you imagine?
(the highlighted one came up in a problem today while solving for 1/sin(x)-1/sin(2x)=1/sin(4x))
(the highlighted one came up in a problem today while solving for 1/sin(x)-1/sin(2x)=1/sin(4x))
May 14, 2025 at 12:27 AM
I have a lot of people to thank for my journey, but I have to say the minimal polynomials of cos(n pi/m) made me into the man I am today. Well no, but can you imagine?
(the highlighted one came up in a problem today while solving for 1/sin(x)-1/sin(2x)=1/sin(4x))
(the highlighted one came up in a problem today while solving for 1/sin(x)-1/sin(2x)=1/sin(4x))
One of the more obtuse ways to calculate Fibonacci numbers. My determinant formula circled in green gives rise to the recursion r -> 1+1/r. The fixed point r=1+1/r is solved by r=phi, the golden ratio
May 7, 2025 at 2:30 AM
One of the more obtuse ways to calculate Fibonacci numbers. My determinant formula circled in green gives rise to the recursion r -> 1+1/r. The fixed point r=1+1/r is solved by r=phi, the golden ratio
Monday morning fit check.
April 7, 2025 at 3:37 PM
Monday morning fit check.
Holy blast from the past meme
November 15, 2024 at 12:32 AM
Holy blast from the past meme
It shows as animated in the preview! Oh well. This is physics I learned ~10 years ago, but it's fun to come back to. tldr is that it's a cool system where you can see the transition between behavior of one type and another if you study it carefully enough.
November 14, 2024 at 7:54 AM
It shows as animated in the preview! Oh well. This is physics I learned ~10 years ago, but it's fun to come back to. tldr is that it's a cool system where you can see the transition between behavior of one type and another if you study it carefully enough.
Gifs don't work right? smh my head, it works on mathstodon.xyz/@davidphys1/...
November 14, 2024 at 7:53 AM
Gifs don't work right? smh my head, it works on mathstodon.xyz/@davidphys1/...
Using simulated annealing to move towards a constant density configuration in an SPH-like setup. This particular setup isn't useful, but I love how it has a random terraced texture look.
October 26, 2024 at 4:33 AM
Using simulated annealing to move towards a constant density configuration in an SPH-like setup. This particular setup isn't useful, but I love how it has a random terraced texture look.
You don't understand how over it had to be for us to be this back bestie (although there's no gif support so omegadog is a shadow of its true self)
July 28, 2024 at 1:13 AM
You don't understand how over it had to be for us to be this back bestie (although there's no gif support so omegadog is a shadow of its true self)
Hello bluesky! I forgot about you, but I've still been making cool things.
community.wolfram.com/groups/-/m/t...
community.wolfram.com/groups/-/m/t...
July 17, 2024 at 5:57 AM
Hello bluesky! I forgot about you, but I've still been making cool things.
community.wolfram.com/groups/-/m/t...
community.wolfram.com/groups/-/m/t...
First hydrodynamics (SPH) simulation! It's just a "dumb" first pass to prove that I can get stuff like energy conservation to work. The obvious next step is to scale up to millions of particles instead of a thousand or so!
www.khanacademy.org/computer-pro...
www.khanacademy.org/computer-pro...
December 5, 2023 at 1:47 AM
First hydrodynamics (SPH) simulation! It's just a "dumb" first pass to prove that I can get stuff like energy conservation to work. The obvious next step is to scale up to millions of particles instead of a thousand or so!
www.khanacademy.org/computer-pro...
www.khanacademy.org/computer-pro...
Same as @diffgeom.bsky.social, LaTeX! If you converse physics with me you'll find me either screenshotting or linking to mathb.in all the time. Really good for sharing and allowing other people to see the equations and source code! For example, something I was sketching out today: mathb.in/76892
November 11, 2023 at 5:02 PM
Same as @diffgeom.bsky.social, LaTeX! If you converse physics with me you'll find me either screenshotting or linking to mathb.in all the time. Really good for sharing and allowing other people to see the equations and source code! For example, something I was sketching out today: mathb.in/76892