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I've just finished high school but I don't feel my knowledge of mathematics is good enough. I'd like to start again from scratch, possibly adding a bit (a lot) of problem solving to it. What is the order in which I should study the various branches of mathematics? What are some good books to do so? Keep in mind that for 'starting from scratch' I mean starting from (possibly at a university level) set theory and the four operations. Thanks in advance for the answers!

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You might find the answers to this question relevant: math.stackexchange.com/questions/177167/… –  GBeau Aug 3 '12 at 7:37
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3 Answers 3

I feel like it depends on where you are headed. If you want to make mathematics you future profession, the way you take will be different from what say an engineer will take. For example, in my case I am engineering student and i got to study plenty of calculus, probability and much of the fancy stuff but by the end of the day i still felt my knowledge of maths to be unsatisfactory(that's why i am on his site by the way).

So on the way to achieving your goal, here is what i can tell depending on my experience.

If engineering is your way:

You have to work very much on problem solving. A possible way to approach the task, here it is. Start will "normal" calculus but now try to understand the concepts not just for computing answers but also try to understand what it means in real life. For example, say "limits". You must have studied those in high school. Understand carefully what it means. Try to find examples where this concept might fit. Here is an example: I am given a material whose 'flexibility' is modeled by a given function. And that function depends on temperature. Here limits may help you understand how the material behaves when the temperature tends towards a certain value. See ... Try to start thinking like that about concepts, not just solve some exercises - but don't get me wrong: exercises are of crucial importance in learning, but the difference between you and a maths software is that you must understand the why of every computation you are doing.

Now a possible road map:

I/ Calculus:

  1. Limits
  2. Differentiation
  3. Integration
  4. Series
  5. Gamma and Beta functions
  6. Integral transforms

    • Take a long pause after this be sure you really understand this stuff well
  7. Differential equations

  8. Vector calculus
  9. Complex analysis

II/ Algebra

  1. Matrices and determinants
  2. Linear equations
  3. Vectors
  4. Eigen vectors and eigen values.

From there you can go ahead and study other areas of interest mainly (i) Engineering optimization and numerical analysis (ii) Statistics and probability.

Those two because as an engineer the sooner you start producing results, the better off you are.

Starting with calculus is important because it has a lot of applications you can play with, it gives computational skills fast if you do exercises, has interesting concepts and forms the foundation of much mathematics engineers deal with.

Possible books:

  • "Calculus" by Michael Spivak as already mentioned
  • "Differential and integral calculus" by Richard Courant
  • And some of the "(Applied) mathematics for scientists and engineers". I have no idea which one to recommend they are just so many and some are good.

So basically, it boils down to

  • Understand concepts
  • DO exercises
  • Find practical applications to related the math to real world things

If mathematics is your way:

Now if you want to make mathematics your profession, you will need a different frame of mind. First i am neither a professional mathematician nor have i reached a level where i can say that i am thinking like one. Yet that is my goal too. So i will share with you what i have learnt so far.

First, mathematicians, from i can tell so far, work differently from say physicists and engineers. When a you hit a theorem, don't go ahead and read the proof, first try to prove it yourself.

That will form the basis of the mathematician in you.

Here is the books i can advice to start with.

  1. "How to prove it, A structured approach" by Daniel Velleman. Nice book for an introduction to proofs. I like the idea of givens and Goal.

  2. "Book of proof" by Richard Hammack. Nice little book. You can either start with this one or Velleman. The thing i like with this one is that logic and set theory are separated in comparison with Velleman. - http://www.people.vcu.edu/~rhammack/BookOfProof/

Once you are grounded in Set theory ( not too much though, whatever is provided by the two previous will be enough ) and proofs, continue with these:

  1. Either "Principles of mathematical analysis" by Walter Rudin
  2. Or "Topology without tears" by Sydney Morris - http://uob-community.ballarat.edu.au/~smorris/topbook.pdf
  3. Or "Abstract Algebra: Theory and applications" by Thomas Judson - Also online for free but as new user i cannot post more than 2 links

Always try to prove theorems before reading the proof. Every time you read a mathematics book, usually graduate level ( don't be concerned about these for now ), and they tell you that a certain amount of mathematical maturity is expected from the reader, what that simply means is that they expect you to be able to prove the theorems or at least follow the logical arguments.

Mathematical literature

Also I highly advice like others that you try to read about mathematics in the general sense. Some books you may start with, here they are.

  1. "God created the integers - the mathematical breakthroughs that changed history" by Stephen Hawking. Interesting books, this is!
  2. "What is mathematics" by Richard Courant
  3. "The music of the primes - searching to solve the greatest mystery in mathematics" by Marcus du Sautoy

You may not be able to follow, the proofs in the two first books but nonetheless, you will enjoy the ride!!!

So that's the best i can do for my level and I wish you good luck and success!

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I cannot agree with Spivak's Calculus in engineering section; it is a beautiful introductory analysis text written primarily for mathematics majors. Only applications in that book are contained in one chapter, and that chapter is completely optional. It also could be read before Rudin, as (or at least I've heard so) Rudin is void of any motivation, while Spivak is full of it, and introduces many of concepts that appear in Rudin, though on lower level of sophistication. As for Sydney Morris' "Topology without tears", it has 0 motivation and thus I wouldn't recommend it to beginners. –  user5501 Aug 4 '12 at 3:14
    
(contd.) Even graduate texts like Bredon's "Topology and geometry" have more motivation and enlightenment than "Topology without tears"! –  user5501 Aug 4 '12 at 3:16
    
@Lovre Pešut: About Spivak in Engg section: First, the problem with us engineers is that we go straight ahead using theorems without even checking if the conditions are met. And that is just one example of the careless use of maths we do. And the book is in that section so that s/he can do careful math!Second:it would be great if s/he understand concepts and relate them BY her/himself to the real world, without any help.My point being, when s/he suffers trying to grasp the concept, looking here and there for applications it will be very hard to forget that particular concept. –  nt.bas Aug 4 '12 at 9:54
    
(contd.)About motivation: you are right, most of those books have no motivation! But my purpose isn't exactly to point only to motivating textbooks but to help him/her start understanding that in proving theorems or reading advanced material, the only motivation s/he'll have is his/her desire to learn! Nevertheless, I request that, if you can, you update my answer(or post a new one) so that s/he can have access to the motivating material (the best of both worlds, i wasn't saying you are wrong to bring up the motivation factor). –  nt.bas Aug 4 '12 at 9:59
    
I see, I understand and agree with your reasons for Spivak in that section. As for motivation, this is certainly something where there is no consensus, as some people (some mathematicians) like books which are rich in motivation, while some like those who state the material without unnecessary motivation. I definitely belong to the first camp, but I respect others' need for 'clear' presentation. –  user5501 Aug 4 '12 at 10:42
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I had a similar situation some 2 years ago, and here are some quick points from my journey:

  • I started by picking up Gelfand and Shen's Algebra (high school algebra book) and Kiselev's Geometry. Those are solid books for high school material, but they ultimately don't go deeper and thus can neither provide a deep understanding nor display the full beauty of mathematics.
  • Next on my reading list was beautiful Spivak's Calculus. I cannot overstate how good this book is for a beginning student. Spivak's prose is charming, his exposition is insightful and his exercises are interesting. One could, I think, even do Spivak first, as it is self-contained and it (by this I mean its first four chapters) will potentially give you more insight in (highschool) algebra than you could get by reading a (highschool) algebra text.
  • Some people care more and some care less about foundations. In any case, two solid texts are Enderton's treatments of set theory (Elements of Set theory) and mathematical logic (A Mathematical Introduction to Logic). They're not very heavy going, though the latter can get a bit terse sometimes.
  • You mentioned analysis and number theory; you aren't really going to need number theory in analysis, but number theory is beautiful and worth learning for its own sake. I would recommend starting with Dudley's Elementary Number Theory, it's pretty light and has a lot of exercises.
  • I don't have concrete advice about them, but both abstract algebra and topology shouldn't be missed.
  • Read up on mathematics! There are many useful summaries of mathematics, its methods and results, and reading them is crucial for attaining the big picture. One possible resource is The Princeton Companion to Mathematics, but just browsing mathematical articles on Wikipedia or reading some good soft questions here or on Mathoverflow can be very enlightening.
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You fully got my point. I find mathematics fascinating beyond physics, but due to some unfortunate events (i.e. not very good teachers) I never got the big picture down, and that's exactly what I want to have: a big picture. I'm the kind of person who wants to understand deeply everything he studies, with proofs and so on and so forth. That's why I asked for university level courses... –  Gennaro Marco Devincenzis Aug 3 '12 at 9:18
    
@Gennaro: Then I think you would enjoy Spivak's Calculus. Spivak forces you to think deeply, though he does that gently and not through forced sophistication. –  user5501 Aug 3 '12 at 9:26
    
Thank you for your patience. You don't know how useful your answers have been to me. :) –  Gennaro Marco Devincenzis Aug 3 '12 at 9:40
    
@Gennaro: No problem; I enjoy helping other people interested in mathematics! If you have any more questions feel free to ask here, or you can send me an email. –  user5501 Aug 3 '12 at 11:30
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If you want to read up on introductory maths at university level, I would suggest that you take a look at the first-year undergraduate maths curriculum of some university. Especially the "big" universities have websites containing detailed descriptions of their courses and curriculum. See which topics they cover and which books they use. Often you will also be able to find lecture notes etc. which are a good supplement to the suggested literature.

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