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Is this close enough to what you need? y4 = (A1 (-Fc-fl+A1 pL)(-((A1 beta)/(A1 sp+V01))-(A2 beta ?)/(-A2 sp+V02)))/mp^2+1/mp A1 wp; y2 = (-Fc - fl + A1 pL)/mp; result = Simplify[y4, y2 == yy4]; Simplify[result == (A1 yy4...
Consider Solve[{3 x^2 + 4 == 0, 2 y - 2 == 0}, {x, y}, Reals] which just gives you {}. Did it not find a solution? Is there no solution? Is there just an error in the code? You might not know. (For such a simple problem you can look at it...
Go to the help page for ListContourPlot Click on the Details and Options Scroll down to see that it accepts an InterpolationOrder option to let you specify the order
Instead of GridLines->Automatic try perhaps GridLines -> {Range[0, 800000, 50000], Range[-55, -25, 5]} And try including Ticks -> {Range[0, 800000, 50000]} Look up Range, GridLines and Ticks in the help system. Click on Details to see the...
Perhaps Integrate[1, {x, 0, 1}, {z, 0, x}, {y, x/2, x}]
Since x,y>=0 just minimize the sum of your two goals NMinimize[{Abs[4 x + 6 y - 18] + x + y, x >= 0, y >= 0}, {x, y}] In your actual problem you might need Norm[]
Perhaps there is a size limit or perhaps there was another reason that the end of your notebook appears to have been cut off and not shown. If you could edit your post to have all the code then it would be more likely that someone could suggest how...
Does the problem persist with this modification eqns = {(1-r^2) r D[c[z,r],z]==1/10(r D[c[z,r],r,r]+D[c[z,r],r]+D[c[z,r],z,z])-1/100 c[z,r],c[0,r]==0, (D[c[z, r], r] /. r -> 0) == 0, c[z, 1] == 1, (D[c[z, r], z] /. z -> 1) == 0}; ...
What is the value which must be assigned to b all2 = Solve[gamma == (3 t)/(2 (b*((t/t1)^(3/2) - 1))), t]
Will a quick rough approximation help? (Tweak the constants if needed) ListPlot[Table[{y, NIntegrate[gauss[x] sinc[y-x],{x,-40,40}]},{y,-40,40,1/4}],PlotRange->All,Joined->True] ![enter image description here][1] [1]:...