Recent content by Cygnus_A

I've never tried Julia, but I use python and MATLAB all the time. I've been thinking about machine learning as a possible outlet after I finish my phd (if not a professor somewhere -- I've still got lots of time to decide). I spent some time learning about different neural networks and how to...

Ah, ok. The steps are essentially the same then. Just slightly different in how you get your constant vector. Thanks!

So I'm wondering if anyone has personal or anecdotal experience of people making the specific transition from general relativity to an industry job. It doesn't have to use specific math skills from GR, but bonus points if there is some relation. It seems that most of the options are somewhere...

You must be thinking of the fundamental theorem of calculus for gradients -- \phi (\vec b) - \phi (\vec a) = \int_a^b \vec \nabla \phi \cdot d\vec r This was what was presented to me during a proof, and I had never seen it before \int (\vec\nabla p)dV = \oint p d\vec S(oops, and I just...

So we all know the divergence/Gauss's theorem as ∫ (\vec∇ ⋅ \vec v) dV = ∫\vec v \cdot d\vec S Now I've come across something labeled as Gauss's theorem: \int (\vec\nabla p)dV = \oint p d\vec S where p is a scalar function. I was wondering if I could go about proving it in the following way...

Thanks! that's exactly what I was looking for

I haven't looked into this much, but I've been told github is a very useful site for storing, distributing, displaying (as resume link) and updating your work. Also, I might as well include this link in the thread. If you're into computational physics, you might find this stack exchange post to...

Thanks for all the great responses. I like the idea of using compost books as subject books, my only issue with them is that they are so small in page size. I tend to use up a lot of pages really quickly. Maybe I'll find a good notebook that I like so I can buy a bunch. I'll give a sketchbook a...

Hi, I'm wondering how much prior knowledge I would need to get a lot out of this book. I'm considering taking an undergraduate General Relativity course next semester to help me learn parts of this book. I have some basic experience with curvilinear coords/tensor analysis along with a brief...

I think this is the best forum to post in, if not, feel free to move it (maybe career guidance?). Over the course of my undergrad/grad studies I have found that I never look back at notes that I take. This is almost certainly a problem -- not in that I get all my info from books, but rather...

So they say a PhD program is 4-6 years long, with 6 core classes during your first year (in quarters), then electives for the second year, and research after that. Is it at all normal to take graduate courses every year of your PhD? There two many courses that I want to take in the math and...

Are the prereqs for this paper just differential geometry, group theory and QFT?

Thanks! I'm still looking into possible fluid dynamics projects. Any thermo/combustion related ideas?

Here's the advice that I've gotten: 1. take classes during your graduate degree that build job skills 2. do what you're most interested in If you're planning on going into industry, a PhD is not necessary; it can apparently 'overqualify' you for a large set of jobs. Pretty much any type of...

I need to choose a topic for a class project involving fluids and/or thermodynamics. It will essentially be a feasibility study on some proposed improvement to an engineering system (of my choosing). For instance, it could be an improvement to a power plant component that increases combustion...