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Applications of (1-z)/(1+z)
( go to the article → https://www.johndcook.com/blog/2021/02/26/smith-transform/ )
I keep running into the function f(z) = (1-z)/(1+z). The most recent examples include applications to radio antennas and mental calculation. More on these applications below. Involutions A convenient property of our function f is that it is its own inverse, i.e. f( f(x) ) = x. The technical term for this is that f […] The post Applications of (1-z)/(1+z) first appeared on John D. Cook.
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