Geodesic
A Note on Inverse-preservations of Regular Open Sets
Publications de l'Institut Mathématique, _N_S_36 (1984) no. 50, p. 99
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In this note an example is given in order to show that the following lemma is false (Kovačević [3]): If $f:X\to Y$ is an almost-continuous and almost-closed function, then $f^{-1}(V)$ is regular open (resp. regular closed) in $X$ for every regular open (resp. regular closed) set $V$ of $Y$.
Classification : 54C10 
@article{PIM_1984_N_S_36_50_a13,
     author = {Takashi Noiri},
     title = {A {Note} on {Inverse-preservations} of {Regular} {Open} {Sets}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {99 },
     year = {1984},
     volume = {_N_S_36},
     number = {50},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_1984_N_S_36_50_a13/}
}
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Takashi Noiri. A Note on Inverse-preservations of Regular Open Sets. Publications de l'Institut Mathématique, _N_S_36 (1984) no. 50, p. 99 . http://geodesic.mathdoc.fr/item/PIM_1984_N_S_36_50_a13/