User Portlet
| Discussions |
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| For example: I'd like to show, in R3, the elliptical cylinder which results from the equation 16 = 4*(x^2) + y^2. Since this equation only specifies x and y values, it is simply an ellipse (in R2). But it defines the (infinite) elliptical cylinder,... |
| For example, the equation: ((E^t)*(t-1)+1)/t^2 is well behaved and everywhere defined EXCEPT (of course) at t=0. However, since t-->0 from either negative or positive directions results in y-->0, the curve is everywhere smooth. When using Plot[] on... |
| I'm doing a work-through of Boyce/DiPrima's EDE (10th Ed), and one of the problems is to solve explicitly the following equation: y^2*(1-x^2)^(1/2) dy = arcsin[x] dx Now I was ultimately able to solve it manually. But for grins (or... |