How about starting with a less precise, verbal description, just to get an idea of these things. Tensors are physically useful quantities which...
Indeed! Mathematics is, arguably, a tool for modelling our environment, and extending the available numbers has enabled better modelling. Part of...
Lagrange Point. Do a google on 'Lagrange Point': the NASA site is particularly informative.
I joined mensa when I moved to a new town, basically as a way of meeting persons of the opposite sex (well, I was young then). After a few meetings...
[img] I'm not sure I'd agree that physics has more unanswered questions than say, biology or philosophy but it may attract more pseudoscience...
Multiplication is most certainly NOT repeated addition: 2m x 6m = 12 m^2 =/= 6m + 6m The dimension changes with multiplication but not with...
Cutting tools Let's put some science into this thread on Sciforums. 1. All edges will blunt or crack with use. A good cutting knife is one...
He probably means 'mass', as a concentrated equivalent of energy. and, as the last post suggests, the Earth is a 'gravity generator'. As usual,...
Oh, it must be true then.
Touchy, touchy! If I'm a European, in the sense that I live on the continent of Europe, then you're an American, because you live on the continent...
Does it really matter? Aluminium, aluminum, laboratory, labratory. Biscuit, cookie, pavement, sidewalk, crisps, chips. Once we know who we're...
I don't think I would put a human-centred restriction on philosophy. The nature of reality, even in the absence of humanity, is a legitimate...
Agreed - and I remember your previous advice - even if all my tensors are symmetric - I might benefit from the formulism of diff forms. don't stop...
Lethe, please don't get sidetracked by other threads that appear every fukin day or could be answered by a cursory glance into any reasonable intro...
Warren, Please don't give up entirely - at least not until Lethe's diff forms notes are complete. Fuxache - I rely on you guys for education in...
JR, Can you make this a 'sticky' and perhaps take out the non-essential chat? With a bit of luck, Lethe will get a book out of this!...
It won't happen! Unless you believe in multiple universes! cheers, ron.
Re: Re: String Theory? Well -'Elegant' (Greene) - but I do agree. Unless you're a specialist. cheers, ron.
More on 'co' and 'contra' This from: http://www.mathpages.com/rr/s5-02/5-02.htm 'By the way, it may seem that the naming convention is...
The word 'dimension' can be used in several ways. There are the usual 'spatial' dimensions, of which there are 3 (on a macroscopic scale)....
Separate names with a comma.
