## 30 Reputation

2 years, 142 days

## @ecterrab  Thank you for your ...

a) The solution I am expecting is (written in index notation with i,j = 1,2,3 ) \$f__1 = f__1 (a_{ii},a_{ij},a_{ij}, a_{ij} a_{jk}, a_{ki},x,y,z)\$. Note that the trial solution f__1(x,y,z) should also hold. That is why I'm so confused by the empty set as a solution.

b) I've got the invariance condition through calculations "by hand". In matrix notation th

The solution in terms of the invariants is rather trivial. My aim is to extend these equations later once I've got the correct results for this problem.

Best regards!

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Matrix Roation Generator

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Invariance Condition Statistics

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ese are

## @dharr Thank you very much! Everyth...

@dharr Thank you very much! Everything seems to work now :)

## @dharr Thank you very much! I had t...

@dharr Thank you very much! I had tried simplify before, but it seems like it does not work in the context of the DG package. Maybe there are some settings that interfere with the command? Or I'm doing something stupid :)

P.S. I noticed I deleted a line from my code that I didn't mean to. The following should work (Except for expanding the derivative, obviously)

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Defining the Metric Tensor and Calculating the Connection Coefficients

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Defining the PDF as a Tensor (Metric) Density

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Convective Operator

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## @ecterrab Thank you very much! I wi...

@ecterrab Thank you very much! I will check out the Physics package.

## @tomleslie @Carl Love Thank yo...

Thank you very much!

I didn't catch that. What a stupid mistake :)

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