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Table 3 Right neighborhoods of five reflexive relations

From: Approximations of some near open sets in ideal topological spaces

KxkR1xkR2xkR3xkR4xkR5
x1{x1, x4}XX{x1, x4, x5}X
x2X{ x2, x5}{ x2, x3, x4, x5}X{ x2, x5}
x3X{ x2, x3, x4, x5}{ x2, x3, x4, x5}X{ x2, x3, x4, x5}
x4{x4}{ x2, x3, x4, x5}{ x2, x3, x4, x5}{x1, x4, x5}{ x2, x3, x4, x5}
x5{x1, x4, x5}{x5}{x5}{x1, x4, x5}{x5}