ajabu jinsi prof. Strang hutumia hitilafu katika hotuba ya 9 ili kuvutia ukweli kwamba the R(C(A) = R(C(A'))) ... majigambo mengi maprofesa wanaoendeshwa. ningeipuuza tu.####[['prof. Strang', 'Instructor', 'POS'], ['the R(C(A', 'Mathematical_Related_Concept', 'POS']]