1,688 reputation
827
bio website
location
age
visits member for 2 years, 2 months
seen Apr 9 at 20:28

Feb
15
awarded  Yearling
Nov
23
awarded  Popular Question
Nov
20
awarded  Popular Question
Sep
8
awarded  Popular Question
Aug
23
awarded  Notable Question
Aug
4
awarded  Notable Question
Jul
8
awarded  Popular Question
May
23
accepted How to replace a variable that was assigned a value before
May
22
asked How to replace a variable that was assigned a value before
May
14
awarded  Good Question
Apr
24
awarded  Popular Question
Apr
23
asked ComplexExpand absolute squared
Apr
16
awarded  Favorite Question
Apr
15
awarded  Nice Question
Apr
12
accepted How to plot a parametric region representing a coordinate transformation
Apr
11
revised Find white regions in image
Made two cases: arrows may / may not leave white
Apr
11
comment Find white regions in image
@bills I don't how to find the white regions in an image. So I don't know where to start.
Apr
11
comment Find white regions in image
I made a mistake in may question. I said I the arrows have to leave the white region, but in fact they should not. I corrected this. Sorry for that
Apr
11
revised Find white regions in image
Changed that the arrows may not leave the white regions
Apr
11
comment How to collect terms with positive powers in polynomial
@Mr.Wizzard Using DeleteCases is a good idea. This works. Thanks