Acknowledging a single funding source: do I say "partially supported"? I wrote my first academic paper recently (it is in math). I need to put a footnote crediting the NSF for funding. I have noticed that papers almost always say "Partially supported by [grant]". I got all of my funding from one grant. Should I still say partially supported? If so, what is the reason for this?
The NSF requires the following text (or its equivalent) in publications from work funded by their grants:


  "This material is based upon work supported by the National Science Foundation under Grant No. (grantee must enter NSF grant number)."


No need to quantify the level of support.