I'm trying to troubleshoot proofs for an article in a Springer (linguistics) journal. It'd be useful to test out some potential solutions myself rather than describing what I want to the typesetters and asking them to figure things out.
However, I can't figure out how to approximate the Springer math font. It looks similar in some respects (e.g., delimiters) to newtxmath, but other things look unlike any package I'm familiar with (e.g., the Greek letters, mathsf/mathtt).
Is there any way to approximate Springer's latex style (in particular, the math font), or is this impossible without whatever proprietary tools they're using?
Editing to add a photo of a representative formula. The delimiters and the alphabetic letters are very newtxmath, the \lambda and binary/relational operations are not.



Minion Pro. Maybe try to see if the homonymous package yields a correct result. – Bernard Mar 09 '19 at 15:46