LaTeX Help with my post - Latex Error ....

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A user encountered a LaTeX error in a post on the Analysis Forum, specifically with the expression involving the derivative of a function, \gamma^' (t). The issue was identified as the improper use of the apostrophe, which in LaTeX is interpreted as a superscript. The user resolved the problem by replacing \gamma^' with \gamma', but sought clarification on the underlying issue. Another participant explained that to use the apostrophe as a regular character rather than a superscript, it should be enclosed in braces, as demonstrated with \gamma^{'} versus \gamma'. The user expressed understanding after the explanation.
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I have just completed a post in the Analysis Forum ... but unfortunately the post cntains a Latex eroor and I cannot determine what it is ...

The Latex expression that is the problem is \left\lvert \int_a^b \lvert \gamma^' (t) \rvert \ dt - \sum_{ k = 1 }^m \lvert \gamma^' ( \tau_k ) \rvert ( t_k - t_{ k - 1 } ) \right\rvert \lt \epsilon
It shows in the post as \displaystyle \left\lvert \int_a^b \lvert \gamma^' (t) \rvert \ dt - \sum_{ k = 1 }^m \lvert \gamma^' ( \tau_k ) \rvert ( t_k - t_{ k - 1 } ) \right\rvert \lt \epsilon Can someone please help me to find the error ...?

Peter
 
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Peter said:
I have just completed a post in the Analysis Forum ... but unfortunately the post cntains a Latex eroor and I cannot determine what it is ...

The Latex expression that is the problem is \left\lvert \int_a^b \lvert \gamma^' (t) \rvert \ dt - \sum_{ k = 1 }^m \lvert \gamma^' ( \tau_k ) \rvert ( t_k - t_{ k - 1 } ) \right\rvert \lt \epsilon
It shows in the post as \displaystyle \left\lvert \int_a^b \lvert \gamma^' (t) \rvert \ dt - \sum_{ k = 1 }^m \lvert \gamma^' ( \tau_k ) \rvert ( t_k - t_{ k - 1 } ) \right\rvert \lt \epsilon Can someone please help me to find the error ...?

Peter

OK ... I solved the problem ...

I replaced \gamma^' with \gamma' ...

... ... I was just suspicious ...BUT ... what actually is wrong with \gamma^' ... ... ?Peter
 
Peter said:
OK ... I solved the problem ...

I replaced \gamma^' with \gamma' ...

... ... I was just suspicious ...BUT ... what actually is wrong with \gamma^' ... ... ?Peter
In TeX, the apostrophe symbol is automatically interpreted as a superscript. If you want to use it as a super-superscript, you need to enclose it in braces. Compare \gamma' and \gamma^{'}: ${}\ \gamma' \ \gamma^{'}$.
 
Opalg said:
In TeX, the apostrophe symbol is automatically interpreted as a superscript. If you want to use it as a super-superscript, you need to enclose it in braces. Compare \gamma' and \gamma^{'}: ${}\ \gamma' \ \gamma^{'}$.


Oh! OK ... understand...

... thanks Opalg ...

Peter
 
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