# Tag Info

### Solving system of first order PDEs

Update: Solution accuracy modestly improved and accuracy estimate appended. The Finite Element Method used in the last section of the question approximates the PDEs by thousands of sparsely coupled ...
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### How to solve this integral equation numerically?

Although the general problem in the question probably requires the methods referenced by flinty in 285076, the specific problem contained in the question's code, ...
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### Solving A System of Two Implicit Equations

First plot the function you want tointerpolate ...
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Update ...

### Multiple solutions from NSolve

For parametric research it could be better to use FindRoot as follows ...

### Modeling experimental data with differential equations

This should help you underway, but I couldn't find good starting values for the parameters: ...
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### Plotting an integral with solving for a specific constant

As an example, we take a simple function that we can integrate analytically: f[t_] = t + 2; Integrate analytically: ...
1 vote
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### Using ParametricNDSolveValue and MultiNonlinearModelFit to fit an ODE system to datasets

I split the data values and uncertanties into two separate lists, and also grab the time values: ...
1 vote

### Multiple solutions from NSolve

With the OP's sol, we can gather the similar solutions together, find their mean, and if desired, polish them up with FindRoot: <...
1 vote

### Multiple solutions from NSolve

Setting WorkingPrecision->20, it then takes 85 sec. and gives only 3 solutions, although it gives a warning that the input is less precise than working precision: ...
1 vote

### Plot after applying NIntegrate

int is producing seemingly random numbers because AccuracyGoal -> 5, PrecisionGoal -> 4 are too small. Increasing the ...
1 vote
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### Find an instance satisfying equation

It seems there is no real solution in view of ...

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