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Solver fails to solve the following nonlinear system of equations (4th order terms)
```
th = 2400
tk = 320
Solve({th^4 - tw^4 -1.77E-6*qw == 0,
tw^2 - t1^2 +2454*(tw - t1) - 0.2319 *qw ==0,
…
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Imported from SourceForge on 2024-07-06 22:15:21
Created by **[*anonymous](https://sourceforge.net/u/*anonymous/)** on 2010-05-19 09:44:40
Original: https://sourceforge.net/p/maxima/bugs/1988
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It…
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Imported from SourceForge on 2024-07-08 01:39:20
Created by **[dbalague](https://sourceforge.net/u/dbalague/)** on 2018-10-17 15:20:16
Original: https://sourceforge.net/p/maxima/bugs/3477
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To who…
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@vidanovic In a current research project, we work on interior roller blinds and exhaust air which is removed between the glazing and the roller blind. To calculate the air flow through the textile, we…
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**Issue by [bgoodri](https://github.com/bgoodri)**
_Tuesday Aug 23, 2016 at 03:11 GMT_
_Originally opened as https://github.com/stan-dev/stan/issues/2023_
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#### Summary:
Support solving a syst…
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H Khaled,
Nice work!
A quick question: in the while loop [here](https://github.com/khaledghobashy/uraeus_nmbd_python/blob/ea2364ed328baeb33693494ec669e992e86c1488/uraeus/nmbd/python/engine/nume…
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Just found this report which tested MINPACK and NL2SOL on a problem originating from a heart model:
> A New Nonlinear Equations Test Problem, J.E. Dennis, Jr., David M. Gay, and
Phuong Ahn Vu, Tec…
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The Navier-Stokes equations, which describe the motion of fluid substances such as liquids and gases, are fundamental to the field of fluid dynamics. However, several challenging problems related to t…
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A general nonlinear tire model takes the lateral slip angle, camber angle, and normal force as inputs and outputs the lateral force.
$$
F_y = f(\alpha, \gamma, F_z)
$$
If the tires are modeled…
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**Describe the bug 🐞**
Some underdetermined nonlinear systems when simplified have a variable that only occurs on the RHS of observed equations, but is also not an unknown. Thus, it has no value as…