Our Pumpkin Pi T-shirt features digits of Pi carved into a pumpkin.
Pricing: $16 to $18.
What do you get when you divide the circumference of an apple by twice its radius?
Apple Pi.
Available in Black or Ash Gray.
A version of the classic Smiley Face design rendered mathematically.
Pricing: $17 to $19.
Front upper left chest: Pi symbol in a circle.
Back announces your true nature: "Irrational but Well-rounded"
Available in Stone Blue, Ash Gray, Violet, and White.
Pricing: $17 to $21.
Product Rule, Chain Rule, Quotient Rule . . . Calculus Rules!
Available in Black, Ash Gray, or Stone Blue.
Pricing: $14 to $16.
SALE! Stone Blue and White Calculus Rules t-shirts are on sale for $10, while supplies last.
Features a valentine heart as the argument for functions from algebra, trigonometry differential and integral calculus, and linear algebra, with the caption "My normal approach is useless here".
This design is printed on a somewhat lighter weight shirt than our usual heavyweight t-shirts.
T-shirt is Black.
Price: $18.
Semper Pi (Always Pi)
Line below reads "United States Math Geeks".
T-shirt is Red.
Pricing: $16 to $19.
Front: "It can be radical, irrational, too complex to be real"
(The quadratic formula)...
Back: "But it gets to the root of the problem."
Available in Black, Ash Gray, and White.
Pricing: $14 to $16.
The quadratic formula with a diagram of a completed square, and the phrase "Solutions for the completely square."
Available in Black, Ash Gray.
Pricing: $17 to $19.
Key Lime Pi T-shirt features a key, a chemical formula for lime, and the Pi symbol.
Available in Black and Violet.
Pricing: $14 to $16.
