Is there a standard for capitalization in references of math papers? How do you capitalize the titles of references in a math paper? Would you rather write:


  Global smooth solutions of the Navier-Stokes equations


or


  Global Smooth Solutions of the Navier-Stokes Equations


? The latter capitalization is the usual capitalization, where every non-grammatical word, and all names, are capitalized. But the former variant seems to be common in the references. The only exception seem to books, which are usually capitalized as on their titles.

I have been skimming over the list of references in mathematical papers by well-regarded researches, but I have not found a definitive pattern. In fact, in many publications, neither the author nor the editor seems to actually care.
Every journal has its own preferences for this. Use a citation management package like BibTeX or EndNote, and follow the style guide of the journal you submit to. In the end, it doesn't truly matter as long as your readers can find the article, but it's best to follow the journal's instructions in the case that they do actually care.