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Geometry is realy just vector analysis that avoids the word vector so to simplify. All definitons from vector notation also apply to geometry. it doesn't matter if you take the hypotenuse as BC (length 5) or CB (length -5) When you take a ruler to measure the length of BC or CB it will in both case...

Length is defined as the norm of a vector. This vector can of cause have negative compontens but the length is always non-negative! Err, haven't you just redefined the problem? I'm talking geometry (Euclidean, even - though we can be Cartesian if you prefer) and you're talking vector analysis. I wi...

Can you give a bit more detail on mesons ?
Are there any non-Gauge bosons?

(They've invented a lot of stuff since I did school physics! )

TIA

Pete

c²=25 has two solutions: c=5 and c=-5. Now lets take a right triangle with legs of the length 3 and 4. Pythagoras tells us that the length of the hypotenuse c is given by c²=3²+4²=25. So by only using math we expect to find a hypotenuse with the length 5 and one with the length -5. Yet in physics n...

No, that was because my example was just a simple one. My point is that in mathematics it's irrelevant. If you try that with 1000 slots and 300 stones you'll have pretty hard time avoiding big numbers but if you just calculate the formula without worrying whether numbers you are just using are 'rea...

Thanks, spencer - I'm back in!

I've 'chat'ted before on efnet#LHC, but now I can't get in - says 'invite only'.
*) is it just me ?
*) how do I get an invite?

In mathematics you may need to "go around" pretty big numbers sometimes to get later back to "normal sized" numbers in the result. For instance, if you have 128 slots and just two stones, the number of ways you may put these two stones into these slots equals 128!/(2! x (128-2)!). 128! is pretty bi...

Errm, if 2^128 is a bigger number than the count of particles in the universe, does it have any meaning? If I count a flock of sheep by dropping a stone on a pile for every sheep that goes out of the fold I can count them back in by taking a stone off the pile for each returning sheep. At the end of...

Lo!

(So I was supposed to say "Hi!"?
Hey, I'm a bit contrary! So what?)

Blessed Be!

PeteKropotkin