Talk:Representation theory of the Poincaré group

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Paragraph beginning with "In case of spin 1/2 particles"[edit]

Spinors do not transform unitarily from one inertial frame to another. Therefore, they cannot be interpreted as wave functions. The bra ket notation used in this paragraph is misleading and should be corrected, no? In particular, $\psi ~{\mbox{and}}~\phi$ cannot be identified with $\langle \psi |$ and $|\phi \rangle$ Dharam Vir Ahluwalia (talk) 11:36, 29 June 2023 (UTC)[reply]