Physics Major Struggles with Integration: Books to Help

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Discussion Overview

The discussion revolves around the challenges faced by a physics major in mastering integration techniques, particularly in the context of advanced quantum mechanics coursework. Participants share their experiences and suggest resources to improve integration skills relevant to physics applications.

Discussion Character

  • Homework-related
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • A participant expresses frustration over struggling with difficult integrals encountered in an advanced quantum mechanics course and seeks book recommendations for improvement.
  • Another participant suggests that a math methods book, such as the one by Mary Boas, may cover the necessary integrals for physics courses and asks for specifics about the integrals faced.
  • The original poster recalls a specific integral involving integration by parts and expresses concern over their ability to solve it.
  • One participant questions whether the integral was part of a test and suggests reviewing single-variable calculus material, noting that math methods books may not address integration at that level.
  • A participant introduces a relationship between sine and exponential functions, proposing that this could simplify the integral and make it solvable by integration by parts.
  • Another participant empathizes with the original poster, acknowledging that the integral could be intimidating for many students.
  • The original poster confirms that the integral was part of a midterm exam and expresses disappointment over the instructor's approach to testing, indicating a preference for assessments focused on physics knowledge rather than challenging integrals.

Areas of Agreement / Disagreement

Participants generally agree on the difficulty of the integral discussed and the challenges it presents. However, there is no consensus on the best approach to mastering integration or the appropriateness of the testing methods used.

Contextual Notes

Some participants note that the integration techniques required may not be adequately covered in math methods books, and there is a suggestion to revisit foundational calculus concepts. The discussion reflects varying levels of confidence and understanding regarding integration techniques.

Who May Find This Useful

Students in physics or related fields who are struggling with integration techniques, particularly in the context of advanced coursework, may find the shared experiences and resource suggestions beneficial.

clumps tim
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As a physics major, I felt devastated today when I had to face the toughest integrals in my life for advanced quantum mech course. I am really embarrassed I did bot learn integration properly. please suggest me a good book that will help me excel in sort of integraion I will face for QM and later physics courses.
 
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Any math methods book (ex. the one by Mary Boas) will probably cover integrals needed for physics courses. I'm curious, do you remember what the integrals were?
 
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I remember one, I wanted to do it by integration by parts and then I see its not doable that way.

integral ( r^2 e^(-r/a) sin(kr)) dr

I t must be pretty easy that I misses due to my ignorance
 
Was that for a test? If so, that's a bit strange to not provide an integral table. You might do well to review integration material in a single variable calculus, I don't think math methods books will cover integration at that level. Websites like Brilliant.org have good calculus exercises, so you might check that out too.
 
do you know the relation between sin(x) and e^x? it might simplify this integral to know that since e^ix = cos(x) + isin(x),

that it follows that sin(x) = (1/2i)(e^ix - e^-ix), or some such. i.e. after using this that integral would be doable by integration by parts.

but don't feel bad about that integral, many of us would be troubled by it, and your idea was essentially correct.
 
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mathwonk said:
many of us would be troubled by it
Yeah, it would be pretty scary to see that integral on a physics test.
 
Yes that was in my 1 hour midterm . I thought the instructor was going to test our physics knowledge and not scare us with tricky integrals.
anyway thanks for your suggestions. I will take a look at Boas .
 

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