16:31

breaking a large square into smaller parts the best way

05:56

too tricky for your differential equations class??

15:25

generalizing the internet's favorite integral

08:16

what makes this interesting is not how we solve, but where.

20:34

don't miss out on the techniques for solving this!!

07:01

a nice tricky limit

11:13

my favorite type of equation

08:01

a beautiful elementary geometry result

07:44

use geometry not integration by parts!!

19:27

a great proof of my favorite identity!!!

08:07

an integral that is so close to being simple

08:13

brush up on Calculus before classes start again!!

09:14

the trigonometric substitution skip

09:38

an exponentially interesting differential equation

16:12

the duality between quaternions and vectors

13:39

the best ever approach to this derivative

29:17

the only real cross product is 3 dimensional

12:20

a nice "mixed" Diophantine equation

23:39

Mobius Inversion -- Number Theory's Secret Weapon

15:40

how to find all of the primes

13:48

an integral connection between trigonometry and logarithms

16:07

conquer tricky sums with this nice trick

12:35

an amazing approach to this classic integral

09:55

a very nice differential equation

24:10

Two nice approximations for n!

13:19

a discovery of irrationality from 470 BC

31:02

the strangest circle

12:45

How to solve this non-linear differential equation

15:34

what fractions dream of

21:51

surprising patterns in the signs of derivatives

10:27

"tweaking" the Fermat last theorem equation

17:26

a subfactorial limit

15:50

derivatives "defined" without limits?!?

26:37

the complex derivative is strange...

17:00

this defines my favorite function

11:20

An integral that is out of this world!!

13:45

a very nice Pythagorean triangle puzzle

16:20

Descartes' method of tangents

06:33

My integral for the Heidelberg Integration Bee

11:48

a "primorial" limit

12:40

a very nice approach to this limit.

16:26

a nice expected value problem

10:14

two nice Canadian math problems

09:19

a "changing" version of the Pythagorean theorem

23:11

the Holy Trinity of curves

18:45

Two from the Duke Math Meet

14:01

a wonderfully natural doubly infinite product

09:32

a math problem from the most famous computer programming book??

12:02

calculus in reverse...

12:16

how are these two integrals related??

13:57

a very nice functional/differential equation

38:46

math is nothing

19:38

a prime example of an infinite matrix product

12:33

what a nice Diophantine equation.

15:56

probability of digits in a square root

12:11

a new family of irrational numbers?

10:36

what are special numbers??

19:32

Some geometry behind the Basel problem

21:56

Integrating the impossible

25:53

trigonometry like you've never seen it