On the book Conformal Field Theory by Francesco, Mathieu and Senechal (the yellow book), in the derivation of the propagator kernel [itex]K(\delta t,\xi,\xi')[/itex] on (2.73), the signs on the first and second line just doesn't match.(adsbygoogle = window.adsbygoogle || []).push({});

On first line it has [itex]-\xi^+ T \xi'-{\xi'}^+ T \xi' [/itex] while the second line, after simplifying, has [itex]\xi^+ T \xi'-{\xi'}^+ T \xi' [/itex], which is necessary to identify the term with the derivatives.

However, tracing back up to the definition of the properties of the coherent states, I cannot find any way to fix this sign. Does any one has encounter this part and have a solution?

(For those without the book, the page is attached)

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# Sign confusions on CFT (yellow book) Page 29

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