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Lectures on Vector Calculus - CSUSB
way of writing the nine equations (1.1) and (1.2). For example, if we choose i= 2 and j= 3 in (1.3), we get ^e 2 ^e 3 = 0; (1.8) (because 23 = 0 by de nition of the Kronecker delta). This is just one of the equations in (1.1). Letting iand jrun from 1 to 3, we get all the nine orthornormality conditions on the basis vectors e^ 1, e^ 2 and e^ 3 ...
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