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## Main Question or Discussion Point

Hello all.

In a quite easy to follow short piece by Edmond Bertschinger entitled Introductio to Tensor Calculus for General Relativity on page 6 when speaking of the metric tensor he says, referring to the symbol conventions used in the piece :-

"" We reserve the dot product notation for the metric and inversr metric tensor just as we reserve the angle bracket scalar product notation for the identity tensor---""

In the second case he is referring to the action of the identity tensor on a one form and a vector and in the first case he is referring to the action of the metric and inverse metric tensor on two one forms or two vectors.

What, if any, is the difference between the scalar and dot product.

Thanks. Matheinste

In a quite easy to follow short piece by Edmond Bertschinger entitled Introductio to Tensor Calculus for General Relativity on page 6 when speaking of the metric tensor he says, referring to the symbol conventions used in the piece :-

"" We reserve the dot product notation for the metric and inversr metric tensor just as we reserve the angle bracket scalar product notation for the identity tensor---""

In the second case he is referring to the action of the identity tensor on a one form and a vector and in the first case he is referring to the action of the metric and inverse metric tensor on two one forms or two vectors.

What, if any, is the difference between the scalar and dot product.

Thanks. Matheinste