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means the D Theta lengths of the pieces in the first column become r d Theta while the Theta bases vectors are resized to length R. In this the second column meanwhile the D Theta lengths of the pieces become r + Dr * D-Theta and the theta basis vector lengths become R plus Dr.
Conceptualizing the Christoffel Symbols: An Adventure in Curvilinear Coordinates
means the D Theta lengths of the pieces in the first column become r d Theta while the Theta bases vectors are resized to length R. In this the second column meanwhile the D Theta lengths of the pieces become r + Dr * D-Theta and the theta basis vector lengths become R plus Dr.
Conceptualizing the Christoffel Symbols: An Adventure in Curvilinear Coordinates