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In a 1955 paper on surfaces of constant negative Gaussian curvature, Marc-Henri Amsler defines a function $w(x)$ by giving the ordinary differential equation$$w'(x)=frac{1}{x}int_0^x sin(w(t))dt,$$with the...
Asked on 05/05/2021
3 answerI want to explore using FormObject and FormFunction. I copy the most basic example given in the Wolfram Documentation and nothing happens. Here is a screenshot. ...
Asked on 05/04/2021 by sykh
0 answerI want to write a sum over "i" whose limits are like "i" starting 1 to 10 but "i" not equal to 2. How to write this?...
Asked on 05/04/2021 by Madhurima Chakraborty
2 answerI have a differential equation given by -4*D[S[u,v],u,v]==V[u,v]*S[u,v]with boundary conditions S[0,v]==Exp[-(v-vc)^2/(2*sigma^2)]S[u,0]==Exp[-(-vc)^2/(2*sigma^2)]V[u,v]=(1-a/r-b*r^2)*((l*(1+l))/r^2+(a/r^2-2*b*r)/r)where r should be determined from v-u=2*Integrate[1/(1-a/r-b*r^2),r](NOTE: l is a nonzero positive integer, and a and b...
Asked on 05/04/2021 by Mehrab
2 answerI have a list of symbols : gammaVecs =Table[Symbol[StringJoin["gamma", ToString@j, ToString@i]], {j,7}, {i, 40)}];Which I want to use later in Minimize function as well as other...
Asked on 05/04/2021 by yfs
0 answerPlease help me deal with this kind of question about ODEs.My codes are as followsm = 100;a = D[x[t], {t, 2}];t1up = 2 x''[t] + 1/2 (490 +...
Asked on 05/04/2021 by dcydhb
3 answerWith the following:RadialAxisPlot[{3, 8, 5}, AxesLabel -> {"a", "b", "c"}]I obtain the expected output: But I would like the regions...
Asked on 05/04/2021 by Shredderroy
2 answerA support case with the identification [CASE:4387967] was created.FinancialData seems to be losing information. For example in the documentation it says:In[1]:= FinancialData["Currencies"]Out[1]= {"AED", "AFN", "ALL", "AMD", "ANG", "AOA",...
Asked on 05/04/2021
1 answerI am new to Mathematica and I need to solve a system of coupled ODE and PDE with two variables (space and time) and one of the parameters is only...
Asked on 05/04/2021 by Masmoudi Omar
0 answerI have the following function L:σ = 9;L[s_, d_] = (1/(σ*Sqrt[2*[Pi]]))*E^(-(1/2)*((s-(-50-11*Log[d]))/σ)^2)This function L describes basically for some specific d, the distribution of the random variable s. Therefore, for some...
Asked on 05/04/2021
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