- #1

jouvelot

- 50

- 1

$$ \partial /\partial \hat{n}_a (M_{ab} - \delta_{ab} {\rm Tr} (M)/2) = \partial ({\rm Tr} (M)/2)/\partial \hat{n}_b .$$ Can anyone provide some hints on why this is true, please?

Thanks in advance.

Pierre

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- Thread starter jouvelot
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- #1

jouvelot

- 50

- 1

$$ \partial /\partial \hat{n}_a (M_{ab} - \delta_{ab} {\rm Tr} (M)/2) = \partial ({\rm Tr} (M)/2)/\partial \hat{n}_b .$$ Can anyone provide some hints on why this is true, please?

Thanks in advance.

Pierre

- #2

pasmith

Homework Helper

2022 Award

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\frac{\partial M_{ab}}{\partial \hat{n}_a} = \frac{\partial M_{aa}}{\partial \hat{n}_b}

[/tex]

- #3

jouvelot

- 50

- 1

Thanks. This was pretty simple; I should have gotten that ;)

Bye,

Pierre

Bye,

Pierre

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