Today:
-  Announcements:
	
	-  Nick did, indeed, find an error in 10.4, #9, but I think that
		we've got it licked now. Let me know whenever you think you have a
		problem in IMath. It may be you, but it may be IMath, too!
		
	
 -  Two of my favorite undergraduates (soon to be alumni) are giving
		talks today: 
	
	
	-  Parker Kain will be presenting "Reservoir-Based Deep Learning for
		Diagnosis of Parkinson's Disease" (Parker promises that his
		will be accessible to everyone!  Don't fear the title!).
	
 -  Alli Zembrodt will be presenting "Data Analysis of Game of
		Thrones". I'm sure that hers will be entertaining....
	
	
 
	Talks will be from 12:30-1:30, in GH150. 
	
	 
	
 -  Today: 
	
	
	-  Yesterday we finished up with Sect. 12.2: Vectors (pdf, pdf summary)
	
	
	
	-  	The focus was on scaling and adding (and subtracting) vectors, as well
	as "normalizing" them (turning them into unit vectors). 
	
	
 -  
	We also talked about establishing a "local coordinate system" (called
	the "Frenet
	Frame" -- watch video until 5:15, at least!).
	
 
	
	
	
-  Today we're focused on more operations between vectors, in
	particular "multiplication". We continue now with Sect. 12.3: Dot product (pdf, pdf summary)
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