Recent content by Master replies:

But only the angles in that only differ by a multiple of pi they are not compltly different.

No I mean i don't understand what the trig identities have to do with my problem?

I don't quite understand what you mean. If all I know is that sin(x)=sin(x') is it then also true that sin(90-x)=sin(90°-x'). I am sure it is. Do sines only differ by angle, as they only depend on the angle? Sorry if I repeat myself.

So is this true: sin(x)=sin(x')→sin(90°-x)=sin(90°-x')=cos(x)=cos(x')?

More generally if the sinus of a angle is equivalent to another does that mean the angles are the same?

If sin(x)=sin(x') ,where x is some angle and x' a angle of another triangle, does it then follow that sin(x-90°)=sin(x'-90°)=cos(x)=cos(x')?

My question was not if the unknot may be knoted further, I apologize if that was unclear, but rather if the unknot is a primitve form of a higher more complex knot. I do not imagine so but... But more importantly if the closed string may be considered as one and if it is any help to mathematics...

A unknot is pretty much a circle or a 2-sphere, so is a closed string, maybe a bit more irregular but approximatly the same. Of course more is needed to identify the closed string as an unknot than the shape. I assume that it is not so, yet I have no reason to deny it. I hope you may give me a...

I see. Is that mathematically justified ?

To explain my naive questioning, I am unexperienced on the field (simply some of T-duality, Superstring, bosonic string, Ads CFT corespondence) so here is yet another question: Is there are unorientated version of SO (32) similar to type 1 string theory?

Thanks. Very helpfull indeed. I have the (I think) second edition of Zwiebach and the problem should be found at the end of chapter 14 part 1 Basics. Anyway that helped.

I have been following along the problem on SO(32) st. in Zwiebach's "A first course in String theory" and my question concerns this problem. I have no problem with the mathematics of SO(32), at least not at the simple level Zwiebach discusses it, rather the "why" behind a particular concept of...