MHB Ordered numbers - limited or not

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How many ways we can order numbers?
Is there infinity ways to order numbers?
Is there a proof of it?
 
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Well, two numbers, for example, can be ordered in two ways. If we allow partial orders, that is, allow elements $x$ and $y$ such that none of $x<y$, $y<x$ and $x=y$ holds, then there are three ways to order two numbers.
 
Thread 'Derivation of equations of stress tensor transformation'
Hello ! I derived equations of stress tensor 2D transformation. Some details: I have plane ABCD in two cases (see top on the pic) and I know tensor components for case 1 only. Only plane ABCD rotate in two cases (top of the picture) but not coordinate system. Coordinate system rotates only on the bottom of picture. I want to obtain expression that connects tensor for case 1 and tensor for case 2. My attempt: Are these equations correct? Is there more easier expression for stress tensor...
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