검색 결과

...2) \psi = 0</math> i.e. <math>(\Box + m^2) \psi =\psi_{tt}-\psi_{xx}-\psi_{yy}-\psi_{zz}+m^2\psi=0</math>

* <math>D=f_{xx}f_{yy}-f_{xy}^2</math>

** <math>(\Box + m^2) \varphi =\varphi_{tt}-\varphi_{xx}-\varphi_{yy}-\varphi_{zz}+m^2\varphi=0</math>