Пікірлер

• 
  @nafiskarim30712 ай бұрын

  It was just an awesome explaination..I really needed the step by step explaination.

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  @true_betman4 ай бұрын

  What are you trying to explain?

• 
  @ericcytrynbaum4 ай бұрын

  This video makes a bit more sense if you watched the previous one on the course playlist to which it belongs. kzread.info/dash/bejne/Z4iMssajfcewdaw.htmlsi=HmdJL7OnTDgwEGi3

• 
  @YairCat4 ай бұрын

  Incredible explanation, did it every single step of the way towards the solution!

• 
  @zuhairalsaffar70014 ай бұрын

  Sir, how could one thank you for your help and support me to overcome this subject thank you so much 💖 ❤ 💗 ♥ 💕

• 
  @user-dh6xq5oi3j5 ай бұрын

  Thankyou

• 
  @Thereisnoname-_-5 ай бұрын

  w eric

• 
  @elerimorales25066 ай бұрын

  Elegant and easy

• 
  @Vollendung57166 ай бұрын

  save my life before exam，thank you

• 
  @user-vc4dc8yg5p8 ай бұрын

  Hello Eric,What software can be used to bifurcate the non-smooth vector field? Especially，filippov systems

• 
  @SwayamGhanghas8 ай бұрын

  Chl ht BKL

• 
  @yuvrajchadha10218 ай бұрын

  🤣

• 
  @SwayamGhanghas8 ай бұрын

  Pdhne aaya hai ya comment dekhne ​@@yuvrajchadha1021

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  @yuvrajchadha10218 ай бұрын

  @@SwayamGhanghas comment dekhne

• 
  @yuvrajchadha10218 ай бұрын

  I can understand

• 
  @Daniel-li6gu8 ай бұрын

  you are the man Eric

• 
  @sumitroy52048 ай бұрын

  I can't understand 😢

• 
  @yessypincmun39808 ай бұрын

  how about different frequency for example: x(t)=25-10sin(30t)+15cos(45t)+20sin(45t)+5cos(60t) rewrit as single sine

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  @ericcytrynbaum8 ай бұрын

  If you plot that function you’ll see it isn’t a simple sin function.

• 
  @asapvarg9 ай бұрын

  Very helpful, thank you!

• 
  @wesselverstelle834010 ай бұрын

  ai thanks legend!!

• 
  @Shreejaya Жыл бұрын

  I can't get the slopes part & substracting part

• 
  @suparnadash1580 Жыл бұрын

  sometimes the nulclines has not been ploted. please explain the reosen?

• 
  @paulkelemen5087 Жыл бұрын

  Very helpful. Thank you.

• 
  @citrarizqin Жыл бұрын

  Thank you so much for the explanation, sir! This helps me a lot!

• 
  @gradozero8140 Жыл бұрын

  Is it possible to write a ramp than increases from 0 whenever f(x) it's 0?

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  @ericcytrynbaum Жыл бұрын

  I’m not sure what you mean.

• 
  @gradozero8140 Жыл бұрын

  @@ericcytrynbaum Thank you, I would like to create an Heaviside H(x) function that creates an increasing ramp whenever another function f(x) composed by irregular impulses is = 0. This is for tracking the timing between the impulses (the maximum of the ramp=time between the two specific impulses). However, I'm struggling in trying to make the ramp starting from 0, because the easiest way is to make the Heaviside = x whenever f(x) is equal 0, but in this case, the ramp starts from the actual value of x and not from 0. I would have to subtract something but I don't know what, because this is not known in advance, and if I would already know the spacing between the impulses, I wouldn't need the ramp ...

• 
  @ericcytrynbaum Жыл бұрын

  @@gradozero8140 If the impulses are at times t_i, then maybe you want something like this: g(t) = sum over i of (H(t-t_i)-H(t-t_{i+1}))(t-t_i) ?

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  @gradozero8140 Жыл бұрын

  @@ericcytrynbaum Thank you very much. It seems this fits well for regular impulses. But if the impulses are not regular, I'm trying to find a rule to make the ramp starting from 0 whenever f(x)=0 like H(x)=[f(x) <1, 1], however this is good with a fixed value of H(x) like H(x)=[f(x) <1, 1] (going to 1 when f(x) is =0) but setting up a ramp seems impossible. If I refer to the variable x, like that, H(x)=[f(x) <1, x], H(x) doesn't start from 0, but when f(x)=0 H(x) starts from the actual value of x. I should subtract something, but not x, otherwise it will not increase ... I'm wondering if it's possible to create such a piecewise function

• 
  @MinecraftWithRichy Жыл бұрын

  your videos are so clear thank you for working it out so thoroughly.

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  @humahdi4317 Жыл бұрын

  Dear Eric, could you please provide me with tutorial about plotting two bifurcation parameters of Hopf or any explanation from you is highly appreciated

• 
  @calvinjackson8110 Жыл бұрын

  You did not argue in detail why the first limit as t goes to infinity is zero.

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  @tonychen3306 Жыл бұрын

  Hi! Thank you for the awesome video! Would you mind sharing the Desmos notebook? I would like to try out what would repeated eigenvalue look like. Thanks!

• 
  @tfl_supers5362 Жыл бұрын

  Mate I’m in oxford and my lectures on this are shit

• 
  @mankanwarsingh1616 Жыл бұрын

  great explanation

• 
  @user-bx1hl7zx6s Жыл бұрын

  Thank u very much

• 
  @maylingliu Жыл бұрын

  Thank you so much!

• 
  @alishahocane6490 Жыл бұрын

  Thanks

• 
  @lazywarrior Жыл бұрын

  very cool

• 
  @The_bengali_political_analyst Жыл бұрын

  Excellent!

• 
  @Mahlodi_Makobe Жыл бұрын

  appreciate this video so so much

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  @kumuduninilanthi9223 Жыл бұрын

  why did you put a limit -1/2 to 1/2 instead of 0 to 1? if it is not a step function we just put f(x)=1 or something but how do we put value for f(x) if it was a step function? (for final answer )

• 
  @jormaq7851 Жыл бұрын

  I like your videos, but I have a question. What do the green dots you get with the PERIODIC command at the HB point mean? and what information do they give me about the system? Thanks. I expect more xppaut videos

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  @ericcytrynbaum Жыл бұрын

  They denote a periodic solution. Their heights (one above, one below the steady state) are the min and max X value reached by the oscillation and the green dots indicate that the periodic solution is stable.

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  @martinelosudietz67952 жыл бұрын

  I didn't find this particular equality elsewhere. Thanks for sharing, i found it really useful for understanding the response to armonic loads acting on dynamic systems.

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  @irisc34852 жыл бұрын

  Hi Eric, juts wondering for the ode file, why do I have this "illegal expression: X " "Error allocating or compiling X’ " when I put it into XPP

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  @javeriaayub62032 жыл бұрын

  Hi, I want to find Poincare section plane coefficients. Can you guide me on how this software is helpful in my concern?

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  @ericcytrynbaum2 жыл бұрын

  I've never tried using xpp for Poincare maps and related calculations but maybe this page will help: www.math.pitt.edu/~bard/bardware/tut/xppphase.html

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  @luisfernando2622 жыл бұрын

  Excellent explanation. Thank you so much!

• 
  @jj64072 жыл бұрын

  👏

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  @robertparaynojr42592 жыл бұрын

  Thank you, this video lecture gives me a huge help. Also, the explanation is clear!

• 
  @therealtucks2 жыл бұрын

  Come back

• 
  @_framer2 жыл бұрын

  Thanks for the video! In the first example, would the last term of heaviside functions (u3-u4) be subtracted instead of added onto the equation since it is dropping at t=3?

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  @ericcytrynbaum2 жыл бұрын

  I included the minus sign in the function (4-t) so your suggestion would be correct if you changed that to (t-4).

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  @gilbert40042 жыл бұрын

  At around 1:30, you could have integrated from -1/2 to 0, and plugged in +1 for your f(x), correct? Just making sure I understand. Great vid!

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  @ericcytrynbaum2 жыл бұрын

  Yes, as long as the integral is over one full period, the answer is the same.

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  @gilbert40042 жыл бұрын

  @@ericcytrynbaum Great, thank you!

• 
  @Klaus_Gamlng2 жыл бұрын

  I’ve tried calculating your theta multiple times, and I never get 0.64 radians, the closest I got was 0.68. Not sure what I’m doing wrong

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  @ericcytrynbaum2 жыл бұрын

  Try arctan(3/4) or arcsin(3/5).

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  @Klaus_Gamlng2 жыл бұрын

  @@ericcytrynbaum can you explain why it's arctan or arcsin? I'm not understanding

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  @ericcytrynbaum2 жыл бұрын

  @@Klaus_Gamlng sin(theta)=opposite/hypotenuse so to get theta, apply arcsin to both sides. arcsin is the same as sin^(-1). The sides of the triangle are 3/5, 4/5, and 1 with the 3/5 being opposite the angle theta. So sin(theta)=(3/5)/1. Or you could also use tan(theta)=(3/5)/(4/5)=3/4. Those both give you the same answer.

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  @Klaus_Gamlng2 жыл бұрын

  @@ericcytrynbaum I thought sin(theta)=o/h because of SohCahToa? I may just be overthinking it, but I'm trying to work on some calc 4 homework, and im just having a hard time

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  @hms30212 жыл бұрын

  Why not maximise the matlab window before recording?

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  @ericcytrynbaum2 жыл бұрын

  That’s a good question/suggestion. I have no idea why I didn’t do that. Will keep it in mind for the future. Thanks.

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  @anjanballav93482 жыл бұрын

  make some more videos for this series Sir. Its a request.

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  @ericcytrynbaum2 жыл бұрын

  I'm glad the videos I've made are useful for you. Unfortunately, I'm unlikely to make more of these for the time being. Perhaps next year when I once again teach the course I made them for.

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  @brayanalexanderruiz30972 жыл бұрын

  la buena panita 😍😍😍

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  @article13722 жыл бұрын

  Huh, this is funny, I found this video by googling it,

• 
  @fikky.b82462 жыл бұрын

  same it was the first video that popped and im meant to have watched it.

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  @bhanusharma86842 жыл бұрын

  Hello Eric. Your videos are really helpful. I am working on Pred-Prey model with 3dimension equations. Could you please make some videos on how to do phase plane analysis for 3d or more dimension system? Kindly reply