Do we understand the internal spaces of second quantized fermion and boson fields, with gravity included?

URN:NBN:SI:doc-CAYXUGZC2024Mankoč Borštnik, Normadocuments/doc/C/URN_NBN_SI_doc-CAYXUGZC_001.pdfdocuments/doc/C/URN_NBN_SI_doc-CAYXUGZC_001.txt125articlestr. 111-1421580-4992225012995URN:NBN:SI:doc-CAYXUGZCengZaložba UniverzeBlejske delavnice iz fizikeBY-SAbosonsbozonidruga kvantizacijafermionifermionsfizika osnovnih delcevphysics of elementary particlessecond quantizationspin-charge-family theoryteorija spinov-nabojev-družinDo we understand the internal spaces of second quantized fermion and boson fields, with gravity included?the relation with strings theories