# Questions tagged [numerical-value]

Question relating numerical representations, operations and methods, including approximate results instead of exact symbolic results.

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95 views

### Why can't NSolve find values that FindInstance can?

I am trying to solve for \[Epsilon], given three input paramters n, x and ...
168 views

### Why is Around omitted when the uncertainty is zero?

I have a list of values with errors and I use Around[x, dx]. Some of those values have an error of zero though. Mathematica removes the ...
64 views

### NSolve can't solve a system of 2 equations with 2 unknowns

I've been trying to solve a system of 2 equations with 2 unknowns using NSolve. But It's been too slow. I waited for more then an hour without any results. The code is: ...
31 views

### How to treat small numbers in order to gain efficiency and precision in neural network algorithm?

Unfortunately I won't be able to provide a MWE, as it would be too big and complex, and this question will be based on pure semantics, basically (and I understand if this is impossible to answer in ...
52 views

### NMinimze cant find points that satisfy constraints

NMinimize cant find solutions for a function which clearly has one. Setting a working precision resulted in some output, however with error messages about tolerance and precision. Heres my code. The ...
1 vote
62 views

### Numerical Error using compile

I'm trying to compile a function and I'm running into the following error CompiledFunction::cfne : Numerical error encountered; proceeding with uncompiled evaluation. I think I have succeeded in ...
107 views

### Performance improvements using Table and Compile

I'm converting a code from MatLab to Mathematica. It takes MatLab less than a second to compute it while its more than ten minutes in Mathematica. I was hoping to improve the performance. Here's a ...
65 views

### How to make faster of a code containing more iteration point? [closed]

I am trying to evaluate a code of the Power Series Solution method to get the results. Also, the time of evaluation depends on the parameters I am using. When the iteration point is 50, 60, or 80, it ...
1 vote
160 views

### How to make faster of a code containing more iteration points?

I am trying to evaluate a code of the Power Series Solution method to get the results. Also, the time of evaluation depends on the parameters I am using. When the iteration point is 50, 60, or 80, it ...
116 views

### How to minimize numerical error in the code while solving the system of ODEs

I just want to ask in the graph of the code mentioned in the link, while plotting u from {-0.0001,y,0.0001}, the jump is coming because of the numerical error u1-u2. Can anyone please tell me, how to ...
1 vote
141 views

### Finding closed form representations of floating point numbers?

Is there a trick to automatically recognize that ${-0.5771,1.2280}$ are approximately equal to {-EulerGamma, Log[2 + Sqrt]}? These were obtained by using ...
46 views

### Proceeding integral or summation calculation with no explicitly designated quantities, but instead with an abstract 'n' quantities

Could someone kindly tell me how to calculate formulas such as integral or summation with no explicitly designated algebra quantities as derivatives or summands, but the abstract ' n' quantities ...
40 views

### Nested NIntegrate with Matrix Exponential

I wish to perform a numerical integration which involves a matrix exponential. Here's the following code ...
1 vote
71 views

### a problem in numerical integration in Mathematica

I am trying to numerically compute an integral of the following type in Mathematica. I can show that this integral can be computed analytically. Still, I want to make sure Mathematica can also give me ...
1 vote