Airfoils

Here’s something surprising: You can apply a symmetric function to a symmetric shape and get something out that is not symmetric. Let f(z) be the average of z and its reciprocal: f(z) = (z + 1/z)/2. This function is symmetric in that it sends z and 1/z to the same value. It’s also symmetric in […] The post Airfoils first appeared on John D. Cook....

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