Where is the backup directory of auto saves stored - windows?

This is probaby more of a software request and I think it would be useful. 

You can obviously open two worksheets of maple and tile them vertically to give the effect of a split screen but then all the icons of each worksheet reduce the visible on screen real estate in which you can work.

It should work similar to how Excel does it when you split cells.  It would work nicely in situations where you have a diagram or picture you are referring to during the creation of your worksheet. 

Anyways just a request, I'm sure some people would find that functionality welcome. 

So recently I noticed Youtube (owned by Google) has slowly been chipping away at what you could have for free in the past (1080p vidoes easily downloadable) to 720p then recently removed for pro users only at a monthly price. 

Now I noticed all the maple video content can be watched on youtube.  I no longer see links to download the video for offline viewing later from maplesoft (I think they used to be there) they just seem only available on youtube - and now since youtube is becoming less easily available as saveable videos offline it's almost impossible to save a maplesoft video for offline.  I have a question that only recently just started pondering.  Since I can't download the video from maplesoft - there's no download link anymore- seems only available on youtube.  Have all the training videos, recorded webinars, etc..  become the property of youtube and then by parent company become also property rights of google?

Just wondering, since the digital universe in the last couple of years is changing so rapidly, and google / youtube basically becoming a monopolizing giant, dictating the way videos can be watched.  I mean are maplesoft videos on maplesoft servers, or youtube servers? 

Thought I'd throw this out there for thoughts and discussion. 

I notice a LOT of posts/answers being deleted.  Why?  What is the purpose of this destructive nature?

To mapleprimes administrators - Please restore deleted content not related to spam. 

If it is some disgruntled mapleprimes user, I'm only guessing, but just because someone didn't reply or upvote a particular answer doesn't mean it isn't good.  Lost knowledge on mapleprimes is just the first sign of a collapsing civilization ... well .. maybe that's a bit of a stretch. 

It still begs the question, why?

Using Maple to prove one of the axioms in mathematics.

The idea is to prove that (-1)*(-1)= 1.  The mere fact that 0's are involved in the proof makes it harder.  So it's easy enough on paper to solve, as I will show in the steps below.

It is known 0*x=0 for all values of x,
and 1-1=0,
If we let x=-1, then 0*(-1)=0,
sub in for zero   (1-1)(-1)=0,
expand (1)*(-1) + (-1)*(-1)=0, also we agree that 1*y=y for all values of y,
so ......  (-1) + (-1)*(-1)=0,
and therefore (-1)*(-1) = 1

Does anyone have an elegant way of showing that in Maple?