Mark Eichenlaub
Reputation
3,614
Next privilege 5,000 Rep.
Approve tag wiki edits
 Apr 14 awarded Nice Question Apr 14 comment What are the polar coordinates of the origin? I don't completely understand your answer. Can you give an example of a function discontinuous at the origin as you were mentioning, please? Apr 14 comment What are the polar coordinates of the origin? @Qiochu Thanks. How about derivatives? Apr 13 asked What are the polar coordinates of the origin? Apr 1 comment How to show $\arcsin{x} = \frac{\pi}{2} + i \ln{(x+\sqrt{x^2-1})}$? meaningful titles would also be helpful Apr 1 revised Find max/minima of $x\sqrt{16-x^{2}}$ added 135 characters in body; added 34 characters in body; deleted 165 characters in body Apr 1 answered Find max/minima of $x\sqrt{16-x^{2}}$ Mar 28 accepted Is there a geometric interpretation of the exponential function of real numbers? Mar 25 accepted What are the 2125922464947725402112000 symmetries of a Rubik's Cube? Mar 25 comment What are the 2125922464947725402112000 symmetries of a Rubik's Cube? @Joriki Thank you, but doesn't that give the wrong number? The size of the Rubik's cube group is 4*10^19 (en.wikipedia.org/wiki/Rubik's_cube_group). Mar 25 asked Is there a geometric interpretation of the exponential function of real numbers? Mar 25 asked What are the 2125922464947725402112000 symmetries of a Rubik's Cube? Mar 20 revised Logic question: Ant walking a cube deleted 11 characters in body Mar 20 answered Logic question: Ant walking a cube Mar 17 accepted What am I doing when I separate the variables of a differential equation? Mar 16 awarded Nice Question Mar 16 comment What am I doing when I separate the variables of a differential equation? Thanks for the link, but the description there is not what you said. Differentials as described in Wikipedia are not infinitesimal changes. Mar 16 comment What am I doing when I separate the variables of a differential equation? The $dx$ and $dy$ are coming from a single limit. That's what I've been taught in calculus. This answer is logically equivalent to saying "you can do that because you can do that". Mar 16 asked What am I doing when I separate the variables of a differential equation? Mar 14 comment What is an intuitive explanation for $\operatorname{div} \operatorname{curl} F = 0$? Why the down votes?