Questions on the analytic and numeric equation solving functions of Mathematica (Solve, Reduce, NSolve, FindRoot, DSolve, RSolve, etc.).
0
votes
0answers
5 views
Errors in evalauting an expression
I have the following:
Constants:
b3b = 2;
G = (1/eps^2);
a1 = 3;
a3 = 4;
xc = 0.3;
Functions:
...
0
votes
1answer
60 views
-2
votes
0answers
48 views
Solution with constraints
I am using Mathematica after 3 years. I want to solve an expression (equality/inequality) with some constraints on the parameters which are involve in the in-equality. I have 3 questions:
Is it ...
0
votes
1answer
37 views
Given a Boolean representation of a system, how can the Reliability Function be displayed as symbolic algebra?
Can Mathematica 9 convert a Boolean representation of an RBD to its symbolic algebraic form?
If I have a simple series Reliability Block Diagram made up of 2 components, c1 and c2
bexpr1=And[c1,c2]
...
0
votes
0answers
47 views
Using Solve Within Manipulate to Model Feedback Control System Problem
This post is extremely long and I do apologize - but please bear with me with all the explanation of the context of the question - due to how long the code is I have included a hyperlink where you can ...
7
votes
2answers
196 views
Is there any fast way to solve a quadratic matrix equation in Mathematica approximately?
Let the square nonsingular matrix $M$ is a given convergent matrix. What are the best scalar values for $\alpha$ and $\beta$ (in the real numbers domain), at which the following quadratic matrix ...
2
votes
1answer
65 views
ParametricNDSolve and Constraint satisfaction problem
I am trying to find the values of two parameters that allow for a specific result of my differential equations, under different initial conditions.
Given a system of equations:
...
0
votes
2answers
93 views
Solving Within InverseCDF
I have the following input data:
Remove["Global`*"]
x = 5/30 // N;
y = 0.8;
μ = 0.2;
T = 5;
ρ = 0.8;
σ (*to be determined*)
And this is the given equation:
...
2
votes
1answer
92 views
-2
votes
0answers
41 views
transcendental system of equations [closed]
Please somebody help me with these equations -
$x + (25.31*10^\left(-7 \right)(e^\left (38.64x \right) - e^\left (38.64y \right) )-z=0$
$19.32x-19.32y + ln(cos(2.13*10^\left(-8 \right) e ...
1
vote
2answers
80 views
Error using Solve on Matrix Multiplication
I am trying to make a function the will find that value of $x$ in the following equation:
$x.a=b$
all values of $x, a, b$ are matrices. The dimensions of $x$ are unknown, but $a$ and $b$ have the ...
-1
votes
0answers
14 views
Solve the equation with logs? [migrated]
I need to solve this equation,3^(x+1) =15, with logarithims. If you can, could you please explain thoroughly?
2
votes
0answers
116 views
Having Mathematica solve or help solve a set of 8 equations
There is a set of DDE's that arise in leukemia dynamics and I'd like to find the equilibrium points of the system by setting all of the derivatives equal to zero. The system can be described in ...
0
votes
1answer
114 views
How can I solve a set of non-linear equations?
I was wondering whether someone can give me an idea on how I can solve a set of non-linear equations with an unknown exponent
This is what I have:
Known values: N, R
Unknown values: λ, α, J
...
4
votes
1answer
147 views
Asking Mathematica to produce a function of some variables
Given
$$l_0=\sqrt{\frac{\lambda_1(\lambda_0+\mu_0)}{\lambda_0(\lambda_1+\mu_1-1)}}$$
and
$$l_1=\sqrt{\frac{\lambda_0(\lambda_1+\mu_1)}{\lambda_1(\lambda_0+\mu_0-1)}}$$
...
