Some background. I am currently in the editing phase of my dissertation and I have no clue what 'tense?'/'personage?'/writing 'style?' I have used.
For example consider the sentence, "In this chapter we derive the boundary layer equations." I have opted to write in 'third person?' , "The boundary layer equations are derived in this chapter." So essentially I have removed pronouns and put it into some form of past tense as the work has been done. I preferred writing this way in my dissertation as I felt that "we (or I) derive" sounds like it's currently being done (right now) which felt unnatural to me.
However, I have run into 2 slight problems. 1) I can't identify this writing style if I need to google some help with it. 2) I have a sentence I don't know how to write in this style.
The sentence is "To the best of our knowledge, no such derivation exists." Maybe a derivation does exist, but we can't find one.
I wrote it as "It is currently unknown if such a derivation exists." However, I feel this has a meaning of 'nobody knows if it exists' whereas it's really just me and my supervisors.
What is this style of writing called? Have I correctly written my sentence and I am just overthinking it?