Since I'm not that good at (as I like to call it) 'die-hard-mathematics', I've always liked concepts like the golden ratio or the dragon curve, which are easy to understand and explain but are mathematically beautiful at the same time. Do you know of any other concepts like these?
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Online MathJaX editor
Echelon form for a $2\times 2$ matrix
What books do you recommend before 'Concrete Mathematics'?
Visually stunning math concepts which are easy to explain
