Words to Describe theorems

How theorems often is described ("________ theorems")

• useful
• principal
• integral
• completeness
• remarkable
• scientific
• value
• simple
• certain
• elegant
• type
• various
• many
• called
• central
• preceding
• several
• relevant
• arithmetical
• mathematical
• analogous
• universal
• formal
• dual
• limitative
• additional
• famous
• important
• classical
• point
• reciprocal
• main
• foregoing
• general
• corresponding
• difficult
• logical
• above
• known
• usual
• interesting
• fixed
• geometrical
• basic
• meaningful
• miscellaneous
• ergodic
• abstract
• beautiful
• contradictory
• related
• familiar
• rigorous
• following
• numerous
• powerful
• fundamental
• geometric
• elementary
• subsequent
• bound
• standard
• euclidean
• complex
• preliminary
• previous
• generalized
• area