A new cardinal function on topological spaces

• Autores: Dewi Kartika Sari, Dongsheng Zhao
• Localización: Applied general topology, ISSN-e 1989-4147, ISSN 1576-9402, Vol. 18, Nº. 1, 2017, págs. 75-90
• Idioma: inglés
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• Resumen

  • Using neighbourhood assignments, we introduce and study a new cardinal function, namely GCI(X), for every topological space X. We shall mainly investigate the spaces X with finite GCI(X). Some properties of this cardinal in connection with special types of mappings are also proved.