Recent content by weirdoguy

Why are you wasting your time doing this instead of just learning what is already known?

It's on the top of the page:

This whole thread rotates around the point that @gen x can't see a mathematical fact about kinematics without using math. I think that to adopt a frame in which this point moves 'forward', @gen x needs to learn the math :wink:

This is simply wrong. Energy is a property of matter, one of many.

It is a covector, but that does not mean that angular momentum also is.

You ignored other questions @A.T. asked. Where is the maths?

Then stop using sentences that needs to be backed up by references.

Modern Ramanujan would certainly know proper maths. If not, he would not be modern Ramanujan.

I like seeing crackpots banned. Especially when stupidity is triumphing in real life.

Oh that's tricky, because I usually trip over the last one, because I loose focus too early, so I guess it's more important for me. Long live astigmatism 🥸

Yes, but still some people wouldn't call those tensors "the same object". Especially most mathematical physicists/mathematicians that I know, including myself. But yes, physicists with their sloppy use of language would :wink:

Are they? Tensors are mappings from cartesian products of vector spaces and their duals. What you wrote are coordinate representations of different coordinate-free objects, since they have different domains. Eg. ##T^{\mu\nu}e_{\mu}\otimes e_{\nu}##, ##T_{\mu\nu}\varepsilon^{\mu}\otimes...

Oh yes. And if I don't have time, I don't teach them. Where? I mean, I understand this thred is an example, but from my experience, most people are ok with friction being real and Coriolis force being not real.

No we wouldn't. It's basic psychology. No amount of wishfull thinking on your part will change the way humans, and in particular humans brains, work. Mind you - I'm a teacher. Most of my students are already fatigued because of the amount of work they have in school and after it. It is very...

Yes, these papers are too good to be true. They are pure nonsense.