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Oct
23
revised Ovals of plane curves (and esoteric surfaces in space)
More examples
Oct
23
answered Ovals of plane curves (and esoteric surfaces in space)
Oct
22
comment Ovals of plane curves (and esoteric surfaces in space)
LogicalExpand also helps one see what is going on. I don't have any ideas how to automatically interpret the conditions though.
Oct
22
comment Ovals of plane curves (and esoteric surfaces in space)
Reduce[y^2 - x^3 + x == 0, {x, y}, Reals] gives something tidier with only two cases - one with a bounded range of x, the other unbounded.
Oct
20
answered How do I format the output to include the function definition?
Oct
20
comment How do I format the output to include the function definition?
Perhaps HoldForm[X[x, y, z]] == X[x, y, z] // TraditionalForm?
Oct
15
comment Help recreating a gif
+1. But now colour your lines according to the (dynamic) height.
Oct
13
comment Square root estimation
@dionys I'm not sure why you would expect it to work with negative numbers though. There's nothing in the algorithm that will give you a complex number.
Oct
13
comment Faster way to use Solve in a multiple parameters function
FindRoot finds just a single root numerically. So it will vary depending on where you start it. One technique might be to do a coarse grid with the full Solve. Then use those as starting points for a finer FindRoot grid.
Oct
9
answered Sublist pattern matching
Oct
9
answered What is the best way to write a polynomial in the Bernstein basis?
Oct
9
answered Converting image data to array
Sep
30
comment Factor out square root terms
Simplify[Sqrt[x^3]Sqrt[x - a x]/x, x > 0]
Sep
15
comment Wrong answer from DSolve?
The answer satisfies $u(x) = \left(u'(x)-\frac{1}{n+1}\right)^2$.
Sep
14
comment Composition à la Mondrian
There is a "visual design" under the neat examples for grid that is a bit Mondrianish.
Sep
13
awarded  Good Question
Sep
12
awarded  Nice Answer
Sep
12
answered Homotopy Visualization
Sep
9
comment Creating a variable from Reduce[] output in Mathematica
x = c /. ToRules @ Reduce[...]
Sep
9
revised Force change in aspect ratio of Inset image
added 243 characters in body