Learning
   - This is the map, and it changes in response to inputs.
 
   - That's the learning.
 
   - The basic idea is that you provide inputs. 
 
   - You then find the nearest point to the input.
 
   -  

 
   - How do you find the nearest point?  You use the pythagorean theorem.
 
- Distance between point X0 at A,B, and point Y
    at C, D = sqrt((A-C)2 + 
                                           (B-D)2)
 
   - This works in higher dimensions too, just adding the extra dimensions.