Recent content by Anaxagoras

Thank you Peter Donis for your message. My question was not about the negativity or rather positivity of spacelike events (which is of course pure convention). My question was about the possibility or not to forget totally, at a foundational level, the spacelike part of the metric. The following...

DaleSpam: you are right that, usually, a bilinear form acts on the total space (but you need not consider the tangent space here, we are in special relativity, not in general relativity, so we can work directly on Minkowski space). Nevertheless, there is no mathematical problem to consider a...

Thank you all for your different answers. DaleSpam is right to say that it makes no sense in STR to "exclude events out of a null cone" because, as he says, we can always find two events, inside a given null cone, which are themselves spacelikely related. But it does not really constitute an...

You say that the spacetime interval between two spacelike-separated event is physically significant as the physical length of something. Could you please develop this idea? I am not sure about it. Are you thinking about the "proper length" of a ruler that would join the two events A and B? If I...

Good question. As I said, my question is a not a question from the usual point of view of the physicist, who simply accepts a theory and then asks himself what can be deduced or not within the theory. Rather, my question is about foundations of a physical theory (namely of special relativity)...

My question is about foundations of the special relativity theory. In Minkowski's way of presenting special relativity, with a signature "+ - - -", one associates to every couple of events, a spatio-temporal distance which is null on the light cone, positive if the two events are causally...

Hi, I am a new member and want to present myself. I am interested by philosophy of physics and would like to have confirmation (or not) about some intuitions I have about the foundations of the contemporary physical theories. Best regards