हम बोलेगा तो बोलोगे के बोलता है |

Once we learn something, we never forget that completely. But it decays if we do not refresh it. Like radioactive element, it is never destroyed by it reduces in exponential pattern.

I found an interesting concept - Half Life of Knowledge. Sharing presentation slides on the same. It discusses theorotical compuer science in relation to this topic.

The research has been done by one of my professor in IIT Bombay - H. V. Sahasrabuddhe. Here is the link for his homepage. You may find some more interesting topics like Computational Musicology.