Celebrate one of the most elegant equations in mathematics — Euler’s Identity — where five of the most fundamental constants come together in perfect harmony. This shirt features the iconic formula that unites 

?, ?, ?, 1 and 0 in a single equation that mathematicians call the most beautiful ever written. 

Perfect for anyone who believes that true beauty can be expressed in a single line of math.

• Made from durable, midweight cotton (170–180 g/m²)

• Blend ratios vary by color, adding softness or texture

• Tubular fabric with taped neck and shoulders for lasting structure

• Reinforced seams on sleeves and hem for durability

• Natural color may include subtle speckling; white may appear off-white due to fabric nature



Each item is printed on demand in order to minimize waste and maximize meaning. 

Thanks for supporting thoughtful, math-driven design.

Age restrictions: For adults

EU Warranty: 2 years

Other compliance information: Meets the flammability, lead, cadmium, phthalates and formaldehyde level requirements.

In compliance with the General Product Safety Regulation (GPSR), Oak inc. and SINDEN VENTURES LIMITED ensure that all consumer products offered are safe and meet EU standards. For any product safety related inquiries or concerns, please contact our EU representative at gpsr@sindenventures.com. You can also write to us at 123 Main Street, Anytown, Country or Markou Evgenikou 11, Mesa Geitonia, 4002, Limassol, Cyprus.