Parity is Discrete Transformation?

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SUMMARY

Parity is defined as a discrete transformation, specifically illustrated by the equations ##Px=-x## and ##P\psi(x)=\psi(-x)##, which apply to continuous variables. The key distinction between discrete and continuous transformations is that discrete transformations, such as space inversion, lack intermediate states; there is no gradual transition from one state to another. For example, there is no halfway point between a left foot and a right foot in the context of parity transformation.

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LagrangeEuler
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Why parity is discrete transformation?
##Px=-x##
##P\psi(x)=\psi(-x)##
when ##x## is continual variable. Could you explain me difference between discrete and continual transformation?
 
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Hi LagrangeEuler! :smile:
LagrangeEuler said:
Could you explain me difference between discrete and continual transformation?

"T is a discrete transformation" means that there's no continuous way of changing from the identity transformation to T

ie there's no system of transformations T(k) with k in [0,1], with T = T(1), I = T(0)

eg if T is space inversion, there's no half-way stage between say a left foot and a right foot :wink:
 

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