PhD thesis

When publishing my PhD thesis as UMCS-91-1-1-1, I was required to keep the number of pages low to save money. This meant small fonts (10 pt), no indentation, narrow page margins, etc., making the thesis unnecessarily hard to read. Over the years, I have also discovered several annoying misprints and minor mistakes as specified in the errata below. I have therefore prepared a revised version where these shortcomings have been removed. Except for the specified shortcomings, I have only altered the formatting.

• Revised version (also available at arXiv: https://doi.org/10.48550/arXiv.2404.16624)
• Photocopy of UMCS-91-1-1
• Errata

Created 03/03/2023. Last updated 11/06/2024.