Questions tagged [numerical-value]
Question relating numerical representations, operations and methods, including approximate results instead of exact symbolic results.
398 questions
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Using NSolveValues for an array of entries [closed]
I have the following code that works for one input, but I'd like to evaluate it for all elements in a vector of entries. I have checked that it works for the individual entries of the vector but want ...
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Can Mathematica recognize $\cos x = x$ as a Dottie Number?
When we try to solve $\cos x = x$, there is generally no closed form solution but Mathematica has many numerical methods to solve it, for example Why doesn't Mathematica solve $x=\cos\,x$ properly?...
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FindRoot error: FindRoot::sszero, FindRoot::dfmin, FindRoot::lstol
I'm trying to solve a highly non-linear system using FindRoot. I need to find r for fixed a=0.9; k=1; m=1; M=1; but at for ...
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How to numerically check the binoharmonic series?
$$
\sum _{k=1}^{\infty }\frac{4^kH_{2k}^2}{k^2\binom{2k}{k}}=8G^2+\frac{103}{2}\zeta \left(4\right)-22\operatorname{Li}_4\left(\frac{1}{2}\right)+7\ln ^2\left(2\right)\zeta \left(2\right)-\frac{11}{12}...
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How does Mathematica compute the Precision of arithmetic calculations involving addition and multiplication of arbitrary precision numbers?
Consider the following simple calculation of the product of two 2x2 matrices composed of numerical values with specified precisions:
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Inconsistent DecimalForm output when using Dynamic values
I'm trying to use DecimalForm to get some appropriate output for labels and such in a visualization. The values will come from a point mapped from a Locator's coordinates, which is fine except that I'...
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Why can't you get a numerical value with a replacement rule? [duplicate]
N[π] outputs 3.14159, but N[x]/.x->π outputs π.
What'...
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Numerical Computation of Multivariate Fox-H function using given codes
This PDF is the expression of SNR of practical RIS-aided system: https://ieeexplore.ieee.org/document/9387559 (expression A.8)
Authors mentioned some sources of computation of multivariate Fox-H type ...
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Problem with FindRoot and FindRoot::cvmit
I'm trying to find a solution (using FindRoot) for a system of three equations for r, W, and \Omega. First I'm attempting to solve it for the simplest case (i.e., <...
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Did the computation of Bessel functions slow down in 14.2?
This is taking much longer to plot than I would expect:
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Optical Bloch Equations for three state atom
Task:
Solve numerically time-dependent optical Bloch equations with given parameters in three state system with 1 ground level. No coherence between 2 upper states.
There's the code:
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How to speed up value function optimization in simple dynamic programming task (cake-eating problem)
There is a book on dynamic programming. There is an introduciton chapter on simple cake-eating problem.
The model is
$$\max_{\{c_t\}} \sum_{t=0}^\infty \beta^t u(c_t) \quad \text{s.t.} \quad x_{t+1} = ...
- 5,017
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Evaluation leaks in calling N[] on held expressions
Calling N[] on a held expression converts the numbers it contains to approximate numbers (unless an argument is protect by ...
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Understanding strange numeric behavior of "Plot" command [duplicate]
I have the following cumbersome expression which I wish to plot:
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