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B Vectors and gradients

  1. Jul 26, 2016 #1
    I was watching a video explaining Einsteins field equations for beginners and he was giving some information on Vectors before he gets into the actual equations. He got to this equation:

    I'm real confused, how does he know that dx and dø are both? Why does dø change to dy? What does the equation even mean? Please help I can't continue the video because I'm real confused on his part.

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    Last edited: Jul 26, 2016
  2. jcsd
  3. Jul 26, 2016 #2


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    Perhaps for beginners doesn't mean for people who have not yet studied calculus?
  4. Jul 26, 2016 #3
    Well that was rather snotty. I figured it out and it was just him not explaining it properly. A forum like this should be welcoming to beginners and not picking fun at their ignorance. If you're not helping then don't reply.
    Last edited: Jul 26, 2016
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