All Questions
4 questions
2
votes
1
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104
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How can I let Mathematica know that the Laplacian of a function is zero?
Suppose I have a long algebraic expression, and in there somewhere I have derivatives of a function V[x,y,z].
I want to set
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1
vote
1
answer
90
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How to express the argument through the function?
I would like to express argument $d$ through $f$ and $B$ and to get $d(f,B)$
$$f(d,B)=B\left(\left(\frac{1}{4}-\frac{d}{B}\right)\left( 1-\left(1- e^{-30d/B} \right)^8\right)+\frac{2/B}{3+1/B^2}\left(...
- 1,893
1
vote
0
answers
61
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How can I force the output of a computation to be as compact as possible, yet complete, by using functions?
I am computing some derivatives in Wolfram Mathematica 11.3. The functions that I have to differentiate (with respect to the state variables) are the equations of motion of a rocket in the atmosphere. ...
1
vote
1
answer
260
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n derivatives on a function of n variables
I want to derive an expression with respect to each variable of a function $f: \mathbb R^n \rightarrow \mathbb R$. More precisely:
$\left(\prod_{i=1}^n\frac{\partial}{\partial_{x_i}}\right) g(f(x_1,...
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