I'm a computer scientist watching your videos who knows all of these concepts you are teaching, but I am still interested simply because you are an excellent teacher who seems to be passionate about the subject. Wish I had teachers like you.
For anybody who cares, you actually find a lot of complex (imaginary) numbers in quantum mechanics. They do exist in nature, just maybe not as obvious as others.
Keep up the good virtuous hard work! You are an amazing teacher. You remind me, sadly, of just a couple I've had. Good teachers are few & far between. I'm so glad I stumbled upon your YouTube channel. thank you.
I love everything about complex numbers, like entire functions, contour integrals and independence of path. It's as amazing and headache inducing as abstract algebra.
I thought the most beautiful identity was Euler's identity since it shows a profound connection between the most fundamental numbers in mathematics. Euler's identity is often cited as an example of deep mathematical beauty. Three of the basic arithmetic operations occur exactly once each: addition, multiplication, and exponentiation. The identity also links five fundamental mathematical constants 0, 1, i, e and π. It is the most beautiful mathematical identity known to man. e^(iπ) + 1 = 0
When I was a small child, my father (who had a math degree) had introduced me to negative numbers, and one day I came home from school upset, saying the teacher had LIED in math class: she said you couldn't subtract a larger number from a smaller one. I wasn't quite accustomed to (and of course she didn't mention) the fact that these sorts of statements are always relative to some domain of numbers: first- and second-grade arithmetic was operating in the natural-number domain, and I had already been given a peek beyond.
Great explanation! I've always wondered what's the difference between imaginary and complex numbers. And also why it was chosen to be sqrt(-1) and not some other number