Hello,
I am an undergrad. I will apply for Ph.D. stats fall 2019. I major in math. I am doing undergrad research with professors in geoscience (mostly laboratory work), civil engineering (machine learning with MATLAB), and math (computational, PDEs). Should I ask for recommendation letters from geoscience/civil engineering professors? My other option for rec letters would be math professors that can only talk about my grades. (I don't know if this is necessary since my grades are already shown on my transcript/GRE).
Thanks in advance for your comments.