A Published text book on computer systems and applications covers C, Relational databses FOXPRO, EXcel, Word with Tips and introduction to Macros
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The notes in complex analysis contain a simplified proof of Dixon's version of Cauchy's theorem and deduces Cauchy's theorem fora simply connected region from it. No Algebraic topology is required neither it is used. It also contains a treatment of elementary functions based on constructive definition of the number PI.