Recent content by jmatt

Mine too! I think it was popular in that era.

Ahh ... thanks! Lot of information in one little graphic.

Thanks everyone. Any thoughts on the "X" and valence electrons?

I was recently in an art supply store and saw a print of a vintage periodic table that I thought had real aesthetic value. I bought it and like any enthusiast I hung it in my bathroom. For the past month I have been studying it as I brush my teeth and feel comfortable with 80% of the...

Thanks very much for this. Very helpful!

Hello guy with the scary picture! I highly recommend https://www.amazon.com/dp/0957389442/?tag=pfamazon01-20 . It starts with a basic review of the math you need and gently leads you through everything! It helped me a lot before I tried more academic books.

Got it now. Thanks very much.

Thanks! A little confused why you referred to ##ds^2## as a scalar. Isn't it a four-vector?

This may seem an odd question but it will clear something up for me. Are "The spacetime interval is invariant." and the "The spacetime metric is a tensor." exactly equivalent statements? Does one imply more or less information than the other? Thanks!

Thanks all. It was the EPR paper that led to Bell's theorem as a response.

desiderata - one of the most haunting words in English.

Thanks Mentz114 very interesting reply. The man was a true giant! If you don't mind ... did anything useful come out of his work on a unified field theory? I understand he believed all physics could be described with geometry as he achieved with gravity. Did any that work contribute to physics?

Did Einstein contribute anything novel (or fundamental or of lasting importance or ... you know what I mean!) to physics after GR?

I forgot to mention I found the emphasis on the association between basis vectors and components to be powerful. It leads to moving beyond thinking of a vector as an arrow to thinking of it as one of many possible associations between basis vectors and components. This generalized association...

I enjoyed this video about tensors very much. I would recommend it to anyone seeking to understand the concept in general and general relativity specifically. https://vimeo.com/32413024 You can fast forward through the repetitive parts and try to place yourself in the role of beginner as you...