Tags » Knot Theory

A counterexample to the Strong Neuwirth Conjecture

A few days ago, my co-blogger Nathan Dunfield posted a counterexample to the Strong Neuwirth Conjecture.

N. Dunfield, A knot without a nonorientable essential spanning surface, …

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Knot Theory

Dongseok Kim 1968-2015

I’m sad to announce the untimely passing of Dongseok Kim, a specialist on Kuperberg spiders and their generalizations. He was also a really nice guy whose conference talks were always well-worth listening to. 145 more words

Knot Theory

How to Tie Every Tie Knot

Triangle. Over and through. Voila. 

Now you know how to tie a tie.

That wasn’t so hard, was it?


Every tie knot is triangular. Some slant off to one side. 183 more words


The Cream Puff Proposal

Bam Bam loves to bake. She’s read Baking Illustrated from cover to cover, and she loves making all sorts of baked goods. Her challah bread is perfect for dipping in soup, and someone has told her she’d like to marry her pretzels. 405 more words


Choose a Button for Streak the Bow Tie

Today I made a new bow tie, which I’ve dubbed Streak. All it lacks is a button – but I can’t decide which one to use. 15 more words


Birthday Bow Ties

You didn’t think I’d forgotten about my fifth work-in-progress for my WIPItGood challenge, did you? I completed three different bow ties of my own design yesterday and gifted them to my Whovian friend for her birthday. 115 more words


Interview and Giveaway with Dedri Uys

Meet Dedri Uys

Dedri Uys is a passionate crochet designer and blogger. She is best known for her Amish puzzle ball designs, which are modular stuffed toys perfect for baby gifts. 359 more words