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Klein-Gordon equation in Einstein notation
Ciro Santilli
(
@cirosantilli,
37
)
...
Linear algebra
Tensor
Einstein notation
Einstein notation for partial derivatives
Laplacian in Einstein notation
d'Alembert operator in Einstein notation
Updated
2025-07-16
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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)
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d'Alembert operator in Einstein notation
Laplacian in Einstein notation
Einstein notation for partial derivatives
Einstein notation
Tensor
Linear algebra
Algebra
Area of mathematics
Mathematics
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