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inspection of the original sources shows that since we have an entry cohesion we should also have an entry elasticity. Created it with some minimum of pointers.
did a few trivial edits regarding mathematical theory of physical elasticity. Created stubs for stress tensor, strain tensor and added pointers to the classical theoretical physics textbook
Regarding the above discussion it seems useful to observe the following:
What Landau-Lifshitz by default speak about throughout their book is what more specifically is called linear elasticity, which is opposed to the hyperelasticity or even plasticity that, for what it’s worth, characterizes rubber.
In this respect the use specifically of rubber in “rubber sheet analogy” (for manifolds, for gravity) is indeed unfortunate. However, usage as in Landau-Lifshitz goes well along with the “gravity is ’an elasticity of space’”-anaogy of Misner-Thorne-Wheeler.
In view of all this the proposal to use elasticity for differential cohesion to go along with cohesion seems not too bad to me. In particular if we understand with Landau-Lifshitz the term to be short for linear elasticity, which via “linearity” matches nicely to what is expressed by differential cohesion.
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