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1. ### Job Skills Switching careers to software development

You are right. It did not occur to me this was important information. But if anyone's curious, I did get a job as a developer! :) Good benefits and decent starting salary. I still feel bad about leaving the academia, and hopefully I can still integrate physics research in my life. For anyone...
2. ### I Could spacetime be non-orientable?

(parachuting in this conversation) I believe chirality would be an issue in this universe.
3. ### Job Skills Switching careers to software development

Hi all In my country, and with the pandemic aggravating affairs, an academic career seems unlikely for me at the moment. It's what I have been preparing for, I finished my PhD and started looking into post doc positions nearby, but no luck so far. So people advised me to try becoming a software...
4. ### I Average of prime factors growth

Sigh. Sometimes I hate my ADD-riddled brain. I'm staring at your code, then at my code, then at my plot, then at your data, and I could not understand why we were getting different results. In my laziness I did the fit without using the actual numbers, but their indices instead! since I was...
5. ### I Average of prime factors growth

(I had a gif of Mike Myers saying "ONE MILLION DOLLARS" but it was causing problems to post it here.) Anyway, a million. I know, I know, in the realm of number theory this must be laughably small.
6. ### I Average of prime factors growth

That's unexpected. I got some really specific numbers in there and I can't find a good fit with just that integration constant. I wonder if that fit I got only works for that range I used.
7. ### I Average of prime factors growth

Nice! The expression is definitely recognizable. The differences come from counting all factors, not just the unique prime factors. Do you have any more theorems in that hat of yours that could include multiplicities as well?
8. ### I Average of prime factors growth

Hi there, bored physicist here. I wondered about factorization so I made some plots and a model fit to satiate my curiosity, but it only made me more curious. Now I just want the answers! I didn't know which prefix to use. "Hobbyist" seemed more appropriate but we don't have that so I went with...
9. ### How to surround myself with other physicists/students outside of academia?

Maybe you're right but I do see other equally competitive fields with a more exciting online presence. Computer science, for example. They can keep their work under wraps and still engage the community about recently published works, sharing opinions and stuff like that. Or, even more useful, to...
10. ### How to surround myself with other physicists/students outside of academia?

No, it's Brazil. I didn't mention because I was more interested in online solutions. Brazil is a large country with lots of physics departments scattered around, but none near me at the moment. That mirrors my experience as well. I guess one of the contributing factors is that physics is a...
11. ### How to surround myself with other physicists/students outside of academia?

Hey, I figured the general discussion would be the most appropriate place for this discussion. I finished my PhD a couple years ago and moved to my original country. I still keep in touch with my previous adviser as we are still working on my thesis research, which is great. However, because of...
12. ### Physics Finished my PhD, Next steps (Brazil edition)

Interesting. I keep hearing that physicists are hired regularly by all kinds of companies, but only hearing about it. For what it's worth, I worked with models beyond standard model, running lattice simulations and studying effective models, that sort of thing.
13. ### I Self teaching analysis and topology

I hear you. At least in physics, whenever self teaching any subject (and even when taking a course) I rarely manage with a single source. And when choosing alternative sources I try to pick different approaches to the same subject, that is why I asked for those extremes. But I am in unfamiliar...
14. ### Physics Finished my PhD, Next steps (Brazil edition)

Exploring other fields also interests me. I got my feet wet on machine learning already. But I really don't know how to break into the industry itself. Every position requires things I don't have yet, like experience or specific diplomas. Thanks for the suggestions though, I really appreciate it.
15. ### I Self teaching analysis and topology

Hi, I am a physicist interested in going through a basic analysis course. The real line, open sets, that whole thing. On my own, so I need a good selection of bibliography, ranging from those that are good references but too dense to actually read to those that are very pedagogical but tend to...
16. ### Physics Finished my PhD, Next steps (Brazil edition)

My apologies. More than a year later I found your reply completely by accident. I was expecting an email notification! Oh well. In any case, my condition has not changed, unfortunately. Still unemployed. Starting my own company is possible, but very, very hard in Brazil. Now post doc is...
17. ### WHAM implementation and testing

Hey all I implemented WHAM to analyze my monte carlo simulations but I am always suspicious that it's not working properly. It gives results that makes sense most of the time but not always. The problem is that all I used is the original paper by Ferrenberg and Swendsen . I have no way of...
18. ### I Bootstrap in Monte Carlo and the number of samples

Oh shoot. I thought this conversation had died after my last comment because I didn`'t get any notification (probably overlooked it). This is still a problem to me, by the way. Bootstrapping still gives error bars unrealistically small. The problem I'm working is a Monte Carlo simulation on a...
19. ### Physics Finished my PhD, Next steps (Brazil edition)

Hey there Finished my PhD and returned to my home country. This topic might alienate most users of this forum because it's specialized for Brazil. From my experience (as a student) all I know a physicist with a path similar to mine does here is work in universities as a professor, teaching...
20. ### A Geometric Group Theory

Hey all I previously asked about some math structure fulfilling some requirements and didn't get much out of it ( Graph or lattice topology discretization ). It was a vague question, granted. Anyway, I seem to have stumbled upon something interesting called geometric group theory. It looks...
21. ### Thesis acknowledgements

That makes sense. I already defended mine though.
22. ### Thesis acknowledgements

Oh wow. None of this is intuitive! Thanks for the help (and I will keep this thanks here in the forum)
23. ### Thesis acknowledgements

I was going for something like "I would like to thank the people in Physics Forums for helpful discussions on this and that topic." But thanks for the feedback. I think I'll just skip it then. Since I already made this topic I'll ask a follow-up question. I'm now a little wary of making more...
24. ### Thesis acknowledgements

Hey all So I'm writing my acknowledgments in the thesis and after the obvious recognition shout outs, advisers, colleagues, collaborators, grants, family, I feel like I should at least mention the faceless internet help. I'm not talking about wikipedia, but discussion forums like this one or...
25. ### I Bootstrap in Monte Carlo and the number of samples

I can try explaining what I'm trying to do a little better. I have a set of data which can be used to calculate a quantity I'm interested in. For sake of example, say we want to calculate the skewness. I take the original data and calculate the skewness. But the data I have is itself a small...
26. ### I Bootstrap in Monte Carlo and the number of samples

Oh, I mean standard deviation of the thing I measured after the whole analysis. I didn't get in detail because it's not a direct quantity easy to detail. Schematically it's something like data > process data into a single quantity. Then bootstrapping resampled data > process into single...
27. ### I Bootstrap in Monte Carlo and the number of samples

I am analyzing a lot of data from Montecarlo simulations and trying to use bootstrap to estimate the standard deviation. what I'm finding however is very, very little variation with each iteration of bootstrap, and I don't know why. Two reasons come to mind. Given the complexity of the analysis...
28. ### Stargazing Possibility of small bodies of liquid etc

Geons are new to me. I like it.
29. ### Stargazing Possibility of small bodies of liquid etc

Sounds like bad news for the hypothetical jacuzzi world! Oh, I read about that one once. I had it on the back of my mind while writing the question because that is definitely the craziest I ever heard. Thanks for indulging me with this silly question, everyone :)
30. ### Stargazing Possibility of small bodies of liquid etc

I'm a physicist but my field is at the other side of the spectrum, but my curiosity has no bounds :P Based on observations we know of several configurations 'clumps of matter' can take, like planets, gas giants, comets, or basic rocks etc. But I always wondered about more unusual possibilities...
31. ### I Breaking down SU(N) representation into smaller groups

Thanks! I appreciate the help. This is an old topic, at the end I went with a very anticlimactic SU(n1)xSU(n2)x some extra matrices (with n=n1+n2). It made sense in the problem at hand.
32. ### A Graph or lattice topology discretization

OK, I did some more reading. Exterior algebra is promising but I suspect the solution might be simpler. I found some more fancy words to describe what I was talking about. I learned the concept of taxicab geometry, where distance is defined as an absolute value from point to point. So maybe if I...
33. ### A Graph or lattice topology discretization

Thanks for pointing to (discrete) exterior algebra. I will have to do some reading to see if that is the way but it's better than what I had before! (nothing)
34. ### A Graph or lattice topology discretization

Mathematicians, I summon thee to help me identify which field deals with this stuff. I come here not as a physicist but as a sunday programmer trying to solve some numerical problems. I set out to model a lattice version of a smooth space. A discretization procedure not uncommon in physics, but...
35. ### A Confusion with finite temperature and lattice formulation

All hail King Vitamin! The amount of effort you put in explaining this makes me ashamed of the amount of effort I put in my first post. Seriously though, thanks, I really appreciate it. So the thing that confuses me is that I'm used to seeing statistical mechanics as the macroscopic behavior of...
36. ### A Confusion with finite temperature and lattice formulation

I think the title sums up pretty well my doubts. I learned QFT from Peskin and Schroeder and other common sources, all implicitly defined QFT at zero temperature. Then I started learning about lattice QCD, how to define the action, how to find continuum limits, the importance of the dependence...
37. ### Suggestion Discord (chat)

Hey all How about a server for the forum on discord? I know this forum had some experience with chat that didn't go so well but I don't think those problems would move to discord. Discord is its own separate thing, no new member will go there confused on where to post on the forum. I only...
38. ### A Summing not over configurations, but over theories

The Lagrangian parameters are already not fixed in the RG context. You have your coupling constants as a function of energy scale. The difficulty seems to be when moving to a region where the real world would require terms that we didn't consider in the Lagrangian. So if your theory starts...
39. ### Questions about microcontrollers

Hey, thanks for helping, you two. Took me a while to get reply but I read it. I started messing around with programming them here. Slow and simple, but fun. I found some projects to make computers out of these micro controllers but they all seem to avoid using more than one, so I'm guessing it...
40. ### Questions about microcontrollers

Hi all. This is the closest thing I know of a "computery" forum, so here goes nothing. I know a microcontroller is basically a tiny computer in a chip, so it's possible to make it into a tiny computer, even having a kernel and tiny os. I've seen people do even simple videogames with pic, atmega...
41. ### I Breaking down SU(N) representation into smaller groups

Hi all I have a shallow understanding of group theory but until now it was sufficient. I'm trying to generalize a problem, it's a Lagrangian with SU(N) symmetry but I changed some basic quantity that makes calculations hard by using a general SU(N) representation basis. Hopefully the details of...
42. ### A Meaning of phase transitions in lattice gauge theories

Hey again. Was about to make a new topic but the title\topic of this one is still appropriate so I'll just revive it. Let me know if creating a new one is more appropriate. So as I'm reading through a book and some papers about lattice one thing often mentioned is the continuum limit. Seems...
43. ### A Meaning of phase transitions in lattice gauge theories

I know it can be hard to answer vague questions. Thanks for the effort! it actually did help. There is a constant struggle between relating lattice models with finite volume with the phases of continuum limit (QCD) and I didn't have the full picture of what the actual QCD phase space looked like...
44. ### A Meaning of phase transitions in lattice gauge theories

Hi all Decided to post in 'beyond standard model' because lattice gauge theories are usually used to explore these models. Hope that's all right. So in lattice simulations, phase transitions in beta mass plane seem to have an important meaning. I understand phase transitions from a...
45. ### This wikipedia article on the standard model is really good

I just wanted to get this out of my system. I'm not talking about the main article on SM but the mathematical formulation one: https://en.wikipedia.org/wiki/Standard_Model_(mathematical_formulation) Very, very hard to find good summarized material on SM out there. It's either good coverage but...
46. ### A Conformal window

Upon reading some more I'm beginning to suspect my problem connecting these dots is the beta function. What we usually see is the one-loop beta function, which shows asymptotic freedom (for number of fermions smaller than 16), however it's calculated using perturbation theory which is not...
47. ### A Conformal window

I'm reading about extensions of standard model and this pops up frequently but it's not very clear. I understand it's a region in parameters space so renormalization group naturally becomes relevant and that's about it for my understanding. I can't connect any of this to the beta function of the...
48. ### A Zeros of the partition function (Yang-Lee and Fisher zeros)

It certainly is. I'll give it a look to see if it has useful details for me.
49. ### A Zeros of the partition function (Yang-Lee and Fisher zeros)

Hey there, Just wondering where I can get a nice treatment of this with derivations. I could swear I read about this in Jon Cardy's Scaling and renormalization in statistical physics but I can't find it again so maybe I was wrong.
50. ### A LSZ, perturbation and renormalization

Since I got an auto-bump, I have been reading about renormalization group and it seems to confirm the basic idea. There's this book called lectures on phase transitions and the renormalization group by Nigel Goldenfeld where he explicitly mentions that RG is essentially non-perturbative. I'm...