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sams

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In Mathematical Methods for Physicists, Sixth Edition, Page 60, Section 1.11, the Gauss' theorem is written as:

In Mathematical Methods for Physicists, Fifth Edition, Page 61, Section 1.11, the Gauss' theorem is written as:

Kindly I would like to know please:

1. What is the difference between the two relations?

2. What does ##\partial{V}## in Equation (1.101a) stands for? In physics, I realized that ##\partial{V}## is usually not included when Gauss' theorem is used, why is that?

Thanks a lot for your help...

In Mathematical Methods for Physicists, Fifth Edition, Page 61, Section 1.11, the Gauss' theorem is written as:

Kindly I would like to know please:

1. What is the difference between the two relations?

2. What does ##\partial{V}## in Equation (1.101a) stands for? In physics, I realized that ##\partial{V}## is usually not included when Gauss' theorem is used, why is that?

Thanks a lot for your help...

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