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I've started readingThe Road To Reality, by R. Penrose, and I've made my way through the first six chapters. Now the author talks about contour integration, and I'm really confused with his explanation.

He says a few things about homologous and homotopic deformations, and then, he talks about the contour integral of [tex]\frac{1}{z}[/tex], and finally Cauchy formula.

Do you know anywhere I could possibly find more (comprehensible) information on those topics?

Thank you very much.

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# Contour integration

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