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One way to address the example is to provide input of the same or higher (arbitrary) precision, sofindmassz[0, 0.14921714620005236`15, 0.07455393513003296`15, 1.016522853606922`15, workprec -> 15] (* 0.643229985259241 *) One can get overflow, probably from f1d[h_] := -Exp[ξ[h]/T]/(T (Exp[ξ[h]/T] + 1)^2) because the size of ξ[h] can be quite ...


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I think that the input field that is used to display the current value of x has its own formatting rules and altering them seems difficult. It does not following PrintPrecision (as in SetOptions[$FrontEndSession, PrintPrecision -> 17], which works for output in an output cell). So a workaround is to specify the Precision of the displayed x, such that ...


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Yes, it's possible, and safe, provided that you do it inside the VM and not in top-level code. (Szabolcs's question provides the proof that dealing with these at top level is not safe; the values are not handled even slightly correctly.) This is reasonable to do for LibraryFunctions, because they can be called efficiently from the VM. First we need a ...



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