Cartoon with fractal teacher asking fractal students, "Why must I iterate and reiterate?"
T-shirt is Black.
SALE! $12 to #13, while supplies last (Regularly $17 to $19).
Math cartoon by Sidney Harris.
Caption: "Every once in a while I just like to unwind with a little addition and subtraction."
Pricing: $16 to $18.
Front: "Integral of Cabin over dCabin equals Log Cabin..."
Back: "+ C"
For those who forget their arbitrary constants, or the natural log.
Pricing: $14 to $16.
Know Your Limits . . . and the limit of the sum of two functions, the limit of the difference quotient as the difference approaches zero, . . .
Available in Black, White, and Violet.
Pricing: $14 to $16.
SALE! White, Ash Gray, and Violet Know Your Limits t-shirts are on sale for $10, while supplies last.
Tessellated fish swim in all directions on this colorful t-shirt.
T-shirt is Ash Gray.
Pricing: $17 to $21.
This Sidney Harris cartoon t-shirt demonstrates the fine points of mathematical proof.
T-shirt is Ash Gray.
Pricing: $16 to $18.
The Fibonacci series (0, 1, 1, 2, 3, 5, 8, 13...) applied to the letters of Fibonacci's name (except that we skipped the zero). T-shirt is Black.
Pricing: $14 to $16.
Front: "Think +"
Back: "Think Positive"
T-shirt is Black.
Pricing: $17 to $21.
For those who make algebra too complicated.
Small Print: "y'gotta parabolam?" And "y? =because it's there."
T-shirt is Ash Gray.
Pricing: $17 to $21.
Front upper left chest: Mathematical notation for "Limit as x approaches infinity of 1/x to the n"
Back: "Take Math to the Limit" accompanied by graph of f(x)=1/x2.
Shirt is Navy Blue.
Pricing: $17 to $21.
