As a woman with a math degree, I know a whole lot more about math than the company making the shirt, and I can tell you right now that if prettiness has any correlation with math ability, it’s probably not the stereotype you’re expecting. (The research I linked there is a whole other kettle of fish, but it was too funny not to use in context! Edit: see comments for why you shouldn’t take that research seriously.)
The company is already known for copyright infringement, which makes me wonder if they ripped this design off from someone else who wants to reinforce ignorant stereotypes. I weep for the world, although there’s some consolation that at least this rag is on clearance so maybe no one was willing to buy it ever.
Jen has some suggestions of better mathy shirts on Epbot: Too Pretty To Do Math?!. So in the spirit of sharing neat mathematical designs, here’s the necklace I’ve been coveting… a beautiful honeycomb design that doubles as a hex wrench from Blend Creations, a company run by fellow geek woman Vivian Cheng who I got to meet at a Girl Geek Dinner once. How cool is that?
Infinitely better than that ignorant t-shirt. Share your own math-positive stuff in the comments!