Comments ( 25 )

# Example of Diagonalizing a 2 x 2 Matrix

**Video Rating: 4 / 5**

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You’re welcome!

You’re welcome! I hope to be doing this for a while yet.

thank you, keep making videos…

tnx bob… i v completed a part of my syllabus at youtube… tnx a lot…

You need to find the null space of A-cI. If you haven’t mastered null spaces, finding eigenvectors will be tough.

You’re welcome! Let me know if you have any questions.

Doctor, thanks for your helpful videos, you’ve helped me a lot with my Linear Algebra lessons (my teacher makes us copy Howard Anton’s Linear Algebra book).

Greetings from Mexico

You’re welcome! Glad to be of help. – Bob

Thank you! This helped me so much!

Thanks for the high praise! I’m happy to take the assist, but those As have to be earned with your hard work. – Bob

You’re welcome! My odds got better – just got my brown belt in jiu-jitsu. – Bob

Speak softly and carry a big stick.

you’re a boss dood

-Tony

Thank you helps alot.

If there was a battle royale of all math teachers I’d put money on you

You are EXCELLENT! best linear algebra teacher I’ve ever listened to! You have solely lead me to A’s in my math class

very nice, slightly above my level for now, but it should come within days. If I might make a suggestion: you’re a big man Dr. Bob, you block out half of your whiteboard at any given time. Could you put a shot with the entire equation at the end maybe? (just a few secs so we can pause the video and take a good look at the entire thing). Other than that: thanks!

These days it’s jiu-jitsu, but haven’t competed since 2010. Trained in boxing, muay thai, and vale tudo many years ago. It hurts longer when you get older. – Bob

do you box, or fight?

You’re welcome! – Bob

Thanks Dr. Bob!

I totally botched that comment, so I removed it before it confuses anyone else. Sorry! I annotated the video since checking is a good point that can’t be repeated enough.

Thanks for the kind words! I hope I’m able to do this for a long time. – Bob

HI Dr. Bob..Thank you for answering my comment ..it seems i did not sort out the p inverse more carefully.. hahaha and you are right .the inverse of P is (1 1/ 2 1).. you are doing a great job sir ~! 🙂 keep up the good work

Hi Dr Bob …i would just like to check if my inverse of P @6:20 .is mistaken or correct .. shouldn’t it be the matrix I 1 -1 I and the lower part is I -2 , 1 I ??? i get first the inverse of P which is P^ -1 = 1/ (-1)(-1) – (2)(1) = -1 then multiplied it by -1 ..please correct me if I’am wrong ..you’ve done a great job explaining this topic very well and I am looking forward on more of your videos :).hope you could reply on this comment .Thank you again and God Bless ^.^

You’re welcome! - Bob

Thank you Dr Bob! After reading through several articles about this I finally found your video!

Thanks for the kind words! I hope to be doing this for a while. – Bob