Abstract
This chapter is dedicated to the extension of the ordinary differential calculus to general curvilinear coordinates in a Euclidean point space. After defining the metric in general coordinates, the Christoffel symbols are introduced to define the covariant derivative of any tensor field in general coordinates. All these concepts are applied to derive the expressions of the differential operators (gradient, divergence, curl, and Laplacian) in any system of coordinates. Then, the above results are analyzed in coordinates that are often used in the applications. Gauss’ and Stokes’ theorems are extended to vector fields that exhibit a jump in their derivatives across a surface (singular surface). The fundamental Hadamard’s theorem is proved for this singular surfaces. The last sections contain exercises and the presentation of the program Operator, written with Mathematica® [69], which allows the user to obtain by computer all the results exposed in this chapter.
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Notes
- 1.
It is worth noting that all the previous definitions are independent of the dimension of the space, whereas the definition (2.34) of curl refers to a three-dimensional space.
- 2.
Except for the generalized polar coordinates, all the other ones are orthogonal.
- 3.
These plots have been obtained by the built-in function ContourPlot of Mathematica® [69].
References
S. Wolfram, Mathematica ®;. A System for Doing Mathematics by Computer (Addison-Wesley Redwood City, California, 1991)
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Romano, A., Marasco, A. (2014). Vector Analysis. In: Continuum Mechanics using Mathematica®. Modeling and Simulation in Science, Engineering and Technology. Birkhäuser, New York, NY. https://doi.org/10.1007/978-1-4939-1604-7_2
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DOI: https://doi.org/10.1007/978-1-4939-1604-7_2
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Publisher Name: Birkhäuser, New York, NY
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