Inverse Filter

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More things to try:

• area inside x^2 - 2xy + 4y^2 = 4
• CNF (P && ~Q) || (R && S) || (Q && R && ~S)
• g(n+1)=n^2+g(n)

Cite this as:

Weisstein, Eric W. "Inverse Filter." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/InverseFilter.html

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