Math and physics Definition and 202 Threads

The Journal of Physics A: Mathematical and Theoretical is a peer-reviewed scientific journal published by IOP Publishing. It is part of the Journal of Physics series and covers theoretical physics focusing on sophisticated mathematical and computational techniques. It was established in 1968 from the division of the earlier title, Proceedings of the Physical Society.
The journal is divided into six sections covering: statistical physics; chaotic and complex systems; mathematical physics; quantum mechanics and quantum information theory; classical and quantum field theory; fluid and plasma theory.
The editor in chief is Martin R Evans (University of Edinburgh).

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  1. Z

    Physics Security Clearance required when applying for jobs related to math and physics?

    I have a quick query. When I'm applying to jobs related to math and physics (software engineer, data analyst, data scientist, python developer, quantitative analyst, programmer, research analyst, etc), I am seeing a good portion of them requiring a security clearance. Is this something others...
  2. mahonskey

    I Hypothetical Eclipse Calculation

    Hypothetical: Approximately how far from Earth would a star the size of the sun have to be for an object the size of a quantum particle to cause a total eclipse of that star when orbiting the Earth at a distance equal to that of Earth to the center fro the moon?
  3. mahonskey

    B Quantum total eclipse of the sun?

    This might be total nonsense, but the thought popped into my head while I was trying to get to sleep, so I thought I see if I could find any advanced help with the following hypothetical: If light were instantaneous, how far from Earth would the sun have to be to cause a quark orbiting in place...
  4. X

    Studying Need some advice: dive straight into physics, or do math first?

    Hello, So, I'm looking for some advice from people here who have experience studying physics outside of an academic program. Recently, I've started Griffiths E&M. Although it hasn't been long, I've been having an absolute blast: like, heart-fluttering, "helping me with suicidal depression"...
  5. Captain Kneecaps

    Programs Pure maths or applied maths as a second major to physics

    I am currently in my second year of studying a bachelor in physics and applied maths. My aim is to one day do research in physics. I am particularly interested in subjects such as gauge theories, AdS/CFT and gravity. My question is whether it would be more beneficial to switch from studying...
  6. O

    What's the use of unit vectors?

    Homework Statement: Hallo. Can somebody explain to me what's the importance-use of unit vector in the below (second) equation? Why isn't the first equation just enough to describe r? What's the reason for unit vector to even exist? Homework Equations: in the photos
  7. Lucas Olivio

    Understanding the Mathematical Explanation for Fresnel Lenses

    Homework Statement: what is the mathematical explanation for fresnel lenses Homework Equations: No equations were provided I'm going to post a link to one article I found that I think has the answer, but I couldn't understand because of my lack of knowledge in physics and math...
  8. S

    A Is there any theory that can be modeled in any type of space?

    Is there any theory in physics that can be modeled in any type of space (Hilbert space, Euclidean, Non-Euclidean...etc)? And if yes, could that theory also contain/be compatible with all types of (physical) symmetries?
  9. pairofstrings

    B What Mathematical Concepts Are Needed to Understand a Jumping Ball in Space?

    I am a beginner and I know a little bit of Math. Can anyone tell me what concepts in Math do I need to know to see one ball jumping in space? I need names of the concepts which let's me realize this Jumping Ball. Thanks.
  10. cordless03

    What math and physics is needed for biophysics research?

    What math and physics is needed for biophysics research? Specifically having to do with medical applications. I am undergrad student interested in physics and medicine.
  11. Zack K

    Programs What math subjects should a physics major master?

    Throughout a degree as a physics major, you take a bunch of math courses, and it's safe to say that you should have a good understanding of all the calculus and algebra courses. But what math subject/specific course should I master at a spiritual level? Especially ones that are needed for...
  12. Adesh

    What is my problem? (Difficulty solving math and physics questions)

    Hello everyone, Physicsforum has always helped me whenever I get into predicament. So this time again I want the help of experienced people. I did a great deal of hard work for understanding the true nature of calculus. I read Newton's original works and I found that his sole purpose of...
  13. danielri1011101

    Admissions Maximizing the "goodness" of a recommendation letter

    Hello everyone, since recommendation letters are usually important when applying for graduate studies, I'd like to ask the following: What do you guys think of the statement 'The best way to maximize the "goodnes" of your recommendation letter is by not caring about it' ? I guess it's...
  14. Loubrainz

    How do I find the intersection of three cones?

    Homework Statement tl;dr: looking for a way to find the intersection of three cones. I'm currently working with a team to build a Compton camera and I've taken up the deadly task of image reconstruction. Background Theory: https://en.wikipedia.org/wiki/Compton_scattering For a single Compton...
  15. Smog

    Programs Is a Double Major in Physics and Mathematics Possible to Achieve?

    So I decided to go for two degrees instead of one so the goal is two associate degrees.One in Physics and the other in Mathematics anyone have any advice on the this math heavy course of action I’ have set for myself.
  16. O

    I How to get a Chaos Sequence from this Equation?

    Hi, I have this equation about Rossler system, describe as Eq. 1. Given that the chaotic behavior of the system for parameter values a=b=0.2 and c=5.7. How can I calculate the chaotic sequence for this equation below. The equation also referred from...
  17. Digital_lassitude

    Is it possible to express friction force as a tensor?

    Homework Statement Consider the equation for the friction force Ff = m FN. is it possible to express the friction force as a tensor? If so, what rank tensor is it, and what are the ranks of the tensor m and the normal force FN? Homework Equations Ff = mFNThe Attempt at a Solution [/B] So I...
  18. S

    Curious about Work done by Gravitational force

    Homework Statement I don’t understand why this would relate to cosine and not sine, if gravity is often assiciated in the up and down part of a free body diagram. Homework Equations Wg=mgdcos(theta)[/B]The Attempt at a Solution Is it because it would depend on your reference frame?
  19. Zeynel

    B The definition of “vector” in math and physics

    I'm learning APL and this is how a vector is defined https://tryapl.org: All data resides in arrays. An array is a rectangular collection of numbers, characters and arrays, arranged along zero or more axes. We can use more specific terms for some arrays, like a single number is a scalar, a list...
  20. J

    Conditions for the applicability of u-substitution

    What are the conditions for applicability of u-substitution, i.e. when does it not work? Note that I'm not asking when is it a bad idea (that won't get you any closer to evaluating the integral), but are there any conditions that cause u-sub to yield wrong answers? I started running into what I...
  21. Smog

    Applied Math or Physics: Which Degree is Right for You?

    Hi Everyone still undecided on weather to go for a Applied Math degree or go with Physiscs
  22. astroman707

    What math is used the most in cosmology/astrophysics?

    Considering one is taking all the required math courses for a typical physics degree, what math electives are most crucial to the field of cosmology/theoretical astrophysics? Also, is it true that mathematical modeling courses(discrete and dynamical modeling across physics) are more important to...
  23. E

    Intro Physics Level of Math Required for Young’s University Physics

    I am a high school student who is planning to start Young and Freedman’s University Physics out of personal interest. However, I am not sure what level of math is required for the book. I haven’t learned Calculus yet, so I’m planning to study Strang’s Calculus alongside Young’s University...
  24. astroman707

    I What math topics should one master for first year physics?

    I’ll be taking the year long physics sequence at my college this fall and I want to know what specific math topics I should master, so that I can conquer my first year of physics. I’m planning to brush-up on any necessary topics from algebra, through precalc, and including calc 1. It’s an honors...
  25. Phylosopher

    Studying Preparing for Math & Physics GRE: Tips & Strategies

    I am taking one year break to work and relieve myself from the burden of the university. I studied physics and minor mathematics. I will apply to PhD or Masters next year. (I will take the GRE next year too). I took the following materials for my minor math: - Real Analysis - Abstract Algebra -...
  26. S

    What are the three main sections to explore on PF?

    Hi all My name is Al Saqib. I am an undergrad student at University of British Columbia, Vancouver. I am studying Economics and Mathematics. My favorite subject is Physics. I have taken a couple of Physics courses so far. I am planning to take more of them, including general relativity.
  27. A

    Courses Figuring out which (undergrad) classes to take

    I have spent the past few months incredibly conflicted. I just finished my freshman year of undergrad (at a 4-year American university) and I have discovered Biophysics, a field which I really want to pursue. However, I still love math and want to continue with my Applied Math major. I'm afraid...
  28. J

    Welcome to the PF: Your Source for General Physics Knowledge and Help!

    I am so happy to be a part of this group. Thr pursuit of knoweledge is the way to learn.
  29. Q

    Studying Can You Successfully Self-Study Math and Physics?

    Has anyone been successful self studying mathematics and physics? By successful I mean to achieve your goals to study and have firm understanding in the subjects. How did you do it? How long did it take?
  30. Mlesnita Daniel

    B What do I need to become an Astrophysicist?

    Hi! I just started high school and have developed a passion for cosmology and astrophysics. I would like to know if I really need to be very good at physics and mathematics (and if there is more that I need to be good at) and where do i find a job (spaces like N.A.S.A., SpaceX etc). Thanks for help!
  31. K

    Scattering angle in relativistic kinematics

    Homework Statement Considering 2 scattering particles with momenta ##p_{1}, p_{2}##, where ##p_{2} = 0## in the Lab reference. The momenta of these 2 particles after elastic collision are ##p_{1}', p_{2}'##, respectively. Due to the 4-momentum relation, we have ##p_{1i}p_{1}^{'i} = e_{1}e_{1}'...
  32. jamalkoiyess

    Courses What courses of the following are the best for my field?

    Hello PF, I am a physics junior and I lately decided on a math double major. I found the topics and classes and interesting enough to do so. Now my prospective fields are either high energy physics or quantum information. And so I wanted to tailor my math electives to help me within these...
  33. A

    Programs Should I Pursue a Double Major in Math and Physics?

    Hello everyone, I am currently attending a community college and at the end of spring, I will graduate with associates in mathematics and physics with roughly a 3.90(depending on the what GPA you're talking about). Physics and math are my life and I dedicate virtually all of my free time...
  34. Nihal Jalal

    How do i learn math and physics from the ground up?

    I know there is a lot of questions like this in this community but I need a personalized answer. I am 15 years old. I've always loved physics and always asks questions. My wish for learning physics dates back to 2016. Yeah that's right, I've spend two years just looking for the right resources...
  35. OldWorldBlues

    How do you calculate air pressure in psi from volume?

    Hiya! I'm an ameture "maker", and recently I've become interested in air pressure and such. I thought a fun project to help me learn about it would be to make one of those small air cannons that are powered by bicycle pumps (safety first and all that). One thing confuses me though: how exactly...
  36. F

    I Longer math and physics problems

    When solving a math or physics problem, the process usually starts with recognizing what type of problem it is and which equations need to be used. This is simple for more straight forward problems. If they give you mass and acceleration and ask you to find the force, you have all parts of the...
  37. O

    Solve Physics/Math Homework: x & y Variables

    Homework Statement You have the data of two measured variables x and y. According to a theory the variables relate to each other as the non-linear functions shown below where A is a constant. For each case, decide which variables you have to choose to plot so the expected graph is a straight...
  38. K

    Studying What math is required to "feel comfortable" with physics?

    Hello everyone. As the title says, what math do I need to know to fully understand classical mechanics, relativity, quantum mechanics... I am studying from a calculus book, but this is mathematics in general it is not focused on physics. So, apart of this calculus book I'm studying from, what...
  39. L

    Schools Did I make the wrong choice? - Grad School Advice

    My undergraduate degrees are in math and physics, but I decided to apply for graduate school in engineering (specifically environmental engineering). I was lucky enough to be accepted to almost all of the programs I applied to, but I only received one research position offer (that would pay for...
  40. M

    Two object leave the same point with different speeds

    Object A starts from the origin velocity 3 m/s and object B starts from the same place with the velocity 5 m/s, 6 seconds later. When will B Catch up with A?
  41. G

    Programs Should I double major in Applied Math and Physics?

    Hello, I am looking for some advice. I am currently going into my 4th year of my Physics degree, going to be graduating in spring of 2018. One of the other students in my major has come up with a way to finish his major in Physics, while also taking the required classes to finish the Applied...
  42. E

    Programs Vector calculus and E&M physics as a engineering major?

    I am an engineering major at Los Angeles Pierce community college. I have been for the last years working 40 hours a week in order to sustain and put myself through community college. After I transfer, I don't plan on working. Now, each semester due to my work schedule and life happening, I can...
  43. S

    Programs Second Bachelor's Degree in Physics in Boston

    It would be greatly appreciated if anyone can provide me with any information on pursuing a second bachelor's degree in Physics in the Boston area. Background: I have a BA in Communications (3.3 GPA) and have been a writer for 10 years. I went back to school last year in the Midwest to pursue...
  44. Jianphys17

    Rigor in Quantum physics -- Do I need to know Functional Analysis well?

    Hello, I've a following question: Is necessary know well func. analysis, and all its theorems to handle well quantum physics...?
  45. G

    Getting started with Physics and Math

    Hello everyone, My question is, where should I start? what books or websites would you recommend for me? Math and physics are very broad subjects so I'm not sure where I should start and what path I should take. I don't want to overload myself with information, but instead learn the most...
  46. Jianphys17

    Other Which Math Methods Book is Better?

    Hi everyone, which text on methods is better between the following two : 1) https://www.amazon.com/dp/0486691934/?tag=pfamazon01-20 2) https://www.amazon.com/dp/3319011944/?tag=pfamazon01-20
  47. R

    Job Skills Math and Physics: Where to work?

    Does anybody have a list of companies that hire mathematicians? Specifically, mathematicians without any financial or statistical background. A list of summer internships would also be appreciated. I've checked out USAJOBS and NSA websites. What else is there? Relevant information about me: I...
  48. M

    I Mass Curving Space-Time: Equations Explained

    It is often said that gravity is a curvature of space-time and not a force. But since gravity is caused by mass, there must be some way in which mass curves space-time. What are the equations for how mass affect space-time?
  49. W

    How to linearise this equation for experiment?

    Homework Statement I have a rotating platform that spins as a mass attached to a wheel rotates the larger platform. The mass accelerates to the ground which spins the platform essentially. I am trying to calculate the moment of inertia of another mass which will be attached to the rotating...
  50. Ian Baughman

    Courses Numerical Linear Algebra or Modern Algebra

    So I am working out a course schedule for my last two years of undergrad and have room for only one more math class but do not know which would be more beneficial. The two courses are Intro to Modern Algebra or Numerical Linear Algebra. I am working towards a bachelors degree in physics and plan...
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