06 / Quiet Signals
Original Edition
Euler Identity: Five Constants
Five constants. One line. No notes.
Final signed artwork
The front, as approved.
Each design carries a discreet proofandparticle.com signature integrated into its own visual language.
Behind the designRead the story
Euler’s identity, e^(iπ) + 1 = 0, is a small statement with an astonishing reach. It brings e, the base of natural logarithms, and π, the circle constant, together with the imaginary unit i and the numbers 1 and 0. Growth, rotation and geometry meet in a single exact relationship.
We chose it for that sense of discovery: ideas that seem to live in different worlds suddenly fit together. That thought shaped the shirt. The equation leads, and the five constants sit individually beneath it, giving each a moment of recognition. “Five constants. One line. No notes.” is our quiet nod to how much an uncluttered line can hold.
Fabric & care
Soft, lightweight cotton for comfortable everyday wear. Our current Black and Navy Bella + Canvas shirts are 100% combed and ring-spun cotton, approximately 4.2 oz/yd² (142 g/m²). These are lightweight shirts, not heavyweight tees.
Turn inside out. Machine wash cold on a gentle cycle with similar colors and mild detergent. Avoid fabric softener and bleach. Do not dry-clean. Air-dry where practical, or tumble-dry on low. Use a cool iron inside out if needed; never iron directly on the printed design.
Pre-shrunk does not mean shrink-proof. Warm or hot washing and high-heat drying can cause further shrinkage and affect the print. Follow the care label supplied with your garment.