Kë tuɛngde kakkëɣic acï cɔɔkpiny nï raan cɔl Bernard Dwork; wɛt waac kennë ke wëël kerou cene kɛk kon cɔɔkpiny, tëdde ℓ-adic cohomology, ɛɛ raan cɔl Alexander Grothendieck cïkke gaam.