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INVERSE LIMITS IN THE CATEGORY OF COMPACT HAUSDORFF SPACES AND UPPER SEMICONTINUOUS FUNCTIONS
- Part of
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- Journal:
- Bulletin of the Australian Mathematical Society / Volume 89 / Issue 1 / February 2014
- Published online by Cambridge University Press:
- 22 March 2013, pp. 49-59
- Print publication:
- February 2014
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- Article
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We investigate inverse limits in the category
$ \mathcal{CHU} $ of compact Hausdorff spaces with upper semicontinuous functions. We introduce the notion of weak inverse limits in this category and show that the inverse limits with upper semicontinuous set-valued bonding functions (as they were defined by Ingram and Mahavier [‘Inverse limits of upper semi-continuous set valued functions’, Houston J. Math. 32 (2006), 119–130]) together with the projections are not necessarily inverse limits in 
$ \mathcal{CHU} $ but they are always weak inverse limits in this category. This is a realisation of our categorical approach to solving a problem stated by Ingram [An Introduction to Inverse Limits with Set-Valued Functions (Springer, New York, 2012)].
