Addition of vectors, the "movie". 
   

Dear Hedva 2m Students:
 
If you write me an email to request them, I will send you a message with
a zipfile attachment of about 1.5 megabytes and/or a message 
with an attached powerpoint presentation fi of about 2 megabytes.

(Perhaps you ask me to send these to, for example, your gmail 
account, because these files are so large.)

When you receive that message:
1. If you requested the powerpoint file you should be able to view
it with Microsoft Powerpoint. I hope it can also be viewed with 
"Open Office". Please let me know whether or not it works for you with
Open Office.

UPDATE: YOU CAN NOW GET THIS POWERPOINT FILE DIRECTLY FROM THE
HEDVA 2M MOODLE WEBSITE.

2. If you requested the zipfile, please download and open it e.g. with
winzip. It will give you 130 graphics files, ("gif" files). Use "Irfan
View" or some other suitable program to look at these files, in their
alphabetical order.

The files are mainly pictures, not so much to read, so it should not
take more than about 10-15 minutes to see the whole thing.
 
If you do this you will see (in English) a sort of simple "movie" or
"presentation" about three dimensional vectors.
 
The main thing there is related to the algebraic definition
of the sum of vectors
[a,b,c]+[x,y,z]=[a+x,b+y,c+z]
and the geometric definition of the sum of vectors, (put the two vectors
head to tail and their sum is the vector that completes a triangle with them.)
 
You will see a quite convincing (I think) explanation of why these two
different definitions give the same thing.
 
I would be interested to hear about any suggestions, comments,
corrections etc. that you may have about these 130 files.
 
KTBH
 
Michael Cwikel