## On proper and exterior sequentiality

##### Authors
Espanol, L.
Calcines, J. M. Garcia
Minguez, M. C.
##### Description
In this article a sequential theory in the category of spaces and proper maps is described and developed. As a natural extension a sequential theory for exterior spaces and maps is obtained.
##### Keywords
Mathematics - Category Theory, Mathematics - General Topology, 54D55, 54C10, 54E99, 18B99