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by
Ciro Santilli
(
@cirosantilli,
32
)
Klein-Gordon equation in Einstein notation
The
Klein-Gordon equation
can be written in terms of the
D'alembert operator
as:
□
ψ
+
m
2
ψ
=
0
(1)
so we can expand the
D'alembert operator in Einstein notation
to:
∂
i
∂
i
ψ
−
m
2
ψ
=
0
(2)
Ancestors
D'alembert operator in Einstein notation
Laplacian in Einstein notation
Einstein notation for partial derivatives
Einstein notation
Tensor
Linear algebra
Algebra
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Klein-Gordon equation
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