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Nov 17, 2019 at 9:31 history closed Qmechanic Duplicate of Divergence of $\frac{ \hat {\bf r}}{r^2} \equiv \frac{{\bf r}}{r^3}$, what is the 'paradox'?
Feb 19, 2019 at 23:11 comment added Ben I picked up the angle bracket habit from mathematicians.
Jan 10, 2019 at 14:14 comment added Ján Lalinský It is not customary to use angle brackets to denote components of a vector. Better use () or [].
Nov 14, 2018 at 2:48 vote accept Ben
Nov 14, 2018 at 2:48
Jan 9, 2018 at 13:47 history protected Qmechanic
Jan 9, 2018 at 11:58 answer added Toffomat timeline score: 5
Jan 9, 2018 at 11:24 comment added Ben Yes! Very true. Thank you. I should have thought of that.
Jan 9, 2018 at 10:21 comment added Qmechanic Hint: You are applying the rules of differentiation where the field is not defined/singular/not differentiable.
Jan 9, 2018 at 10:20 history edited Qmechanic CC BY-SA 3.0
added 10 characters in body; edited tags
Jan 9, 2018 at 10:00 history asked Ben CC BY-SA 3.0