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| Try something likeContourPlot[1/((x - 1500)^2 + (y - 1200)^2) + 1/((x - 1550)^2 + (y - 2000)^2) + 1/((x - 2000)^2 + (y - 1700)^2), {x, 0, 3000}, {y, 0, 3000}]the peak is not so sharp in the given picture, so it looks rather like... |
| Note that you need to use == for equality and that it's usually a good idea to use lower case variables as Mathematica variables are upper case. However, it appears that your problem cannot be solved symbolically.[mcode]In[2]:= DSolve[{f''[t] == ... |
| This also happens if you are using the Mathematica Kernel directly, instead of the main Mathematica gui. If you want to run the kernel directly, graphics can still be displayed. See... |
| Vahid, My guess is that those .exe and .iso files are meant to be used as installers (.exe) or to mount as a disk image (.iso). I am not sure where you obtained those files (they correspond to applciations that I believe one purchases from Wolfram... |