Convolution

• Why calculation of convolution include reversing its input (or its impulse response)?
  • How can output sequence be equal to the sum of copies of the impulse response, scaled and time-shifted signals? - Signal Processing Stack Exchange
  • Flipping the impulse response in convolution - Signal Processing Stack Exchange
  • What is the physical meaning of the convolution of two signals? - Signal Processing Stack Exchange
  • pr.probability - What is convolution intuitively? - MathOverflow
  • Understanding Convolutions - colah's blog
  • Convolution vs. Cross-Correlation–Glass Box
  • The difference between convolution and cross-correlation from a signal-analysis point of view - Signal Processing Stack Exchange