Recent content by mathwonk

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    Undergrad Odd coincidence: two people with same name living on the same street

    A family member in Tennessee, had a neighbor, an author, who once inscribed one of his books for her. Many years later, recognizing his name, I pulled that book off the shelf in a large used book store in Salt Lake City, and saw his inscription to her in the inside cover. Another time, while...
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    "A good big man will beat a good little man" (boxing)

    you seem to be asking for very extreme comparisons, but in the general direction of whether a significantly smaller boxer can win, I suggest you watch a film of the Jack Dempsey/Jess Willard fight; but only if you have a strong stomach for seeing the punishment absorbed by Willard, who...
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    Physics/math: how much knowledge does a high school teacher need?

    In my opinion, one can teach to anyone at any age, anything that one understands oneself. Certainly one cannot teach anything one does not even know about. For this reason, I recommend that a teacher can never know too much. Anything he/she understands well, they can find ways to communicate...
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    At what age is special relativity taught?

    I read about it enjoyably as an 8th grader, from the Universe and Dr Einstein, by Lincoln Barnett, (given to me by my father), but learned nothing of it, (nor much of anything else), in my extremely boring and less than elementary physics class as a h.s. junior.
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    Physics/math: how much knowledge does a high school teacher need?

    @Andy Resnick : Some thoughts on the topic of post #10: https://www.math.uga.edu/sites/default/files/inline-files/onteaching.pdf
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    Undergrad Why ##a^0=1##?

    This has several excellent answers and I cannot improve on them. I just have this persistent nagging voice wanting to express this abstractly, if perhaps not actually usefully for a beginner. Namely, all answers point out, one way or another, that exponentiation is a function that changes...
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    Job Skills Physics Careers: Expectations vs. Reality

    @Surf_and_Sky: Have you talked to anyone at the U (in Salt Lake)? That is a very dynamic place, with lots of very bright people. That's where I think you are most likely to get relevant advice, and from people especially aware of the local options. If you cannot get help there, then maybe you...
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    Undergrad I don't understand Dedekind cuts

    Re: post #5. Here is the usual proof that every set has more subsets than elements. If S is any set (e.g. the set of rational numbers) and 2^S is the set of its subsets, and if S had as many elements as subsets, then there would be a surjective map f:S-->>2^S. We claim this is impossible...
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    High School Abel Prize awarded, 2026, to Gerd Faltings

    Thank you for drawing attention to this. Many years ago, one of my friends told me as a joke on himself, that he had been referee for one of Faltings early 1980's papers, and had scolded the author for being bold enough to suggest that he hoped his work might contribute to a solution of...
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    Is a Prof Failing 3/4 of the Senior Year Physics Class Normal? (Stat Phy)

    by the way, if you decide to try this class, the fact that you know his source for the lecture material and for the exams, should make preparation for them rather straightforward. I.e. together with like minded fellow students, make sure you learn to do every single question on those MIT exams...
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    Is a Prof Failing 3/4 of the Senior Year Physics Class Normal? (Stat Phy)

    The way you describe it, the prof sounds very unreasonable indeed, but we have not heard his version. And at some point you should decide, whether your goal is to maximize your learning, or maximize your grade. It also matters of course whether you are in line for a B- in this class or an F...
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    Grade Inflation at Harvard

    To illustrate what a la-la land the current grading practice at Harvard inhabits, the Harvard college student handbook already defines an A or A- as work of "excellent quality, demonstrating full mastery of the subject", with an A reserved for "extraordinary distinction". And speaking of grade...
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    Grade Inflation at Harvard

    That article was interesting. Some statements should be taken with salt however, e.g. the suggestion that grade inflation is related to the higher caliber of recent students at schools like Florida and Georgia. At UGA, they created a "Hope" scholarship for students entering with a B average...
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    Grade Inflation at Harvard

    I think this is a difficult problem. As a student at Harvard in the early 1960’s, when maybe 15% of grades were A’s, I got a lot of well deserved D’s, until I eventually learned from them to improve my study skills and concentration. I feel now that receiving low grades for mediocre work was...
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    Graduate Trivial fiber bundle vs product space

    It seems indeed this is the usual meaning of trivial, i.e. equivalent to a product, but without a choice of trivialization. I was assuming otherwise, but it was just what seemed plausible to me, not citing any source. I should have remembered my own frequent advice not to disagree about the...