MR′=MC′\mathrm {MR' = MC'}MR′=MC′
MC′>MR′\mathrm {MC' > MR'}MC′>MR′
MC′<MR′\mathrm {MC' < MR'}MC′<MR′
MR′≠MR′\mathrm {MR' \ne MR'}MR′=MR′
