This shirt features a refined mathematical expression for π, written as a double integral in polar coordinates. By integrating over a unit circle, the equation elegantly reconstructs π from the inside out — a powerful fusion of geometry and calculus.

Product details:
• 100% cotton
• Fabric weight: 5.0–5.3 oz/yd² / 170–180 g/m²
• Taped neck and shoulders
• Double seam at sleeves and bottom hem

Each item is printed on demand in order to minimize waste and maximize meaning.
 
Thanks for supporting thoughtful, math-driven design.