This is an interesting math problem

Assumption: a circle (or any polygon shape) inside a tissue paper.

The circle is placed at the center (longest distance) from all edge of the tissue

Every fold need to ensure the tissue cover completely the circle.

What’s the maximum fold the tissue can be used?

[@liaoPythonImport2020] 指出 import 常常遇到的問題

1. Normal communication in a noisy channel –> MLE problem, the SNR is well defined assuming ML estimation (假設 input source distribution 是 50/50 because we don’t know prior!!!!) for the BER!
2. Machine learning –> 先學習到 input distribution –> 使用 MAP for the BER 所以比較好，因為如果 input source only send 1, no 0. 不管 noise 有多大，就直接猜 1! 仍然可以得到很好的結果。就是有 (correct) prior distribution.
3. What about the input distribution is purely random? 那就代表學不到東西！against 學習的基本假設。至少 input distribution 的 noise 可以遠小於 channel noise (from dimension reduction or manifold leanring perspective) ? 所以 low light 還是可以得分！