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Updated on Tuesday, March 3

#20621

OMG: I just had Cauchy-Schwartz inequality stated and proven to me for the 8th different time. Profs need to check what did we learn in other courses so we don't waste time proving the same thing over and over again.

6 comments

  1. What if there are a few students that haven't seen it before? Yes, most students probably have seen certain proofs before, but it eliminates all students complaining that " I haven't seen this before" and " you didnt go over this in class", "I only covered this in another class" etc. CYA afterall.

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  2. i feel you, OP ... i'm in environment and business and in practically every single required course we've had so far, we've had to hear about the "tragedy of the commons" in depth. the first poster has a point, but a bit more coherence would be nice.

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  3. OP, your statement holds if this was taught in a required prerequisite for the course. Otherwise, you can't expect every prof to know what you specifically have learned. A lot of those upper year Math courses aren't requisites for each other.

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  4. At the start of next term do the proof yourself without any help. If every student can do this, I see your point, But there will be students in the class who have forgotten how to do it, so they need to teach it again.

    It also lets them have it on the exams and not have any students complain that they didn't teach it.

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  5. It's a nice refresher since there are a lot of theorems with the name's Cauchy or Schwarz in them.
    Plus the proof and statement takes about 2 minutes so I really don't think it's a big deal

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  6. C-S is very important and extends to many different topics in different ways, you may also just be stating C-S with different notation such as using expectation instead of vectors. There's also the fact some other students may have forgotten.

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