Solving a discrete math puzzle, namely the stolen necklace problem, using topology, namely the Borsuk Ulam theorem

How a famous theorem in topology, the Borsuk-Ulam theorem, can be used to solve a counting puzzle that seems completely distinct from topology.

How a famous theorem in topology, the Borsuk-Ulam theorem, can be used to solve a counting puzzle that seems completely distinct from topology.

A geometry/probability question on the Putnam, a famously hard test, about a random tetrahedron in a sphere. This offers an opportunity not just for a lesson about the problem, but about problem-solving tactics in general.

A geometry/probability question on the Putnam, a famously hard test, about a random tetrahedron in a sphere. This offers an opportunity not just for a lesson about the problem, but about problem-solving tactics in general.

How a famous theorem in topology, the Borsuk-Ulam theorem, can be used to solve a counting puzzle that seems completely distinct from topology.

Lurking in the depths of the mathematics of Einstein's general relativity is an object even stranger than the mysterious black hole. In fact it's the black hole's mirror twin, the white hole. Some even think that these could be the...

Solving a discrete math puzzle, namely the stolen necklace problem, using topology, namely the Borsuk Ulam theorem

Solving a discrete math puzzle, namely the stolen necklace problem, using topology, namely the Borsuk Ulam theorem

LIGHT! Let's talk about it today. Sunlight, moonlight, torchlight, and flashlight. They all come from different places, but they’re the very same thing: light! It’s what makes it possible for us to see the world around us, so it’s worth...

New ReviewRelax and refresh while we gently boost circulation, release tension and recharge your whole body, all while entirely seated in a chair.

In this video we are going over how use the height of an oblique triangle to determine if you have 1 2 or no triangles

When learning about sine and cosine it can be tricky to remember what they mean and how they are useful. In this video I hope to show you exactly what you need to know.

Chair yoga is a great way to get started on your fitness journey, perfect for beginners!! Enjoy this accessible and effective beginner 3 minute routine to strengthen your core and more!

Howcast - Learn how to join motifs or make seams from Lion Brand Yarn's Andrea Lemire in this Howcast video.

Howcast - Learn how to play the double-drag tap from drum teacher Jason Gianni in this Howcast drum video.

Howcast - Learn how to play the single-drag tap from drum teacher Jason Gianni in this Howcast drum video.

Howcast - Learn how to play the triple paradiddle from drum teacher Jason Gianni in this Howcast drum video.

Howcast - Learn how to do a windshield wiper from certified personal trainer James Rizzo in this home ab workout video from Howcast.

Howcast - Learn how to do French braid pigtails as well as how to do Heidi braids with the step-by-step instructions in this hair tutorial from Howcast.

Howcast - Learn about Peyronie's Disease -- scar tissue inside the penis that causes curved, painful erections -- in this Howcast video.

Howcast - Learn how to swim laps in this online swimming lesson from Howcast.

Howcast - Learn how to gather fabric with a sewing machine from designer Jennifer Wiese in this Howcast tutorial.

Howcast - Let tennis pros Joe Perez and Kirk Moritz teach you how to improve your court positioning in this Howcast video.