Task: Explanation
Input (English): The Pinsky phenomenon is a result in Fourier analysis, a branch of mathematics. This phenomenon was discovered by Mark Pinsky of Northwestern University. It involves the spherical inversion of the Fourier transform. Question: The Pinsky phenomenon is a result in a branch of mathematics named after who? Answer: Joseph Fourier
Output (English): The Pinsky phenomenon is a result in Fourier analysis, a branch of mathematics.