@article{article_897822, title={On the invariance of Baire spaces under the various types of mappings}, journal={Communications Faculty of Sciences University of Ankara Series A1 Mathematics and Statistics}, volume={43}, year={1994}, DOI={10.1501/Commua1_0000000480}, author={Çiçek, Mustafa}, keywords={invariance, Baire spaces, arious types of mappings}, abstract={A mapping from a space X into a space Y is called S-opeıı if the image of each somewhere dense subset of X is a somewhere dense subset of Y, or eguivalently for every nowhere dense subset N of (Nj is nowhere dense subsetofA [6.p.45]. In this paper, we first consider a proposition which was proved in [6.p.45 ] on 8-open mappings. We improve this proposition and extend it to the varions types of mappings and some results which show that the preimage of a Baire space is Baire space under the various types of bijection mappings, are obtained.}, publisher={Ankara University}