# Walk-through to Morel-Voevodsky A¹-homotopy theory part II (page 48, Lemma 1.1)

Wednesday, November 04th, 2009 | Author: Konrad Voelkel

*Here is the second part of my walk-through to Voevodskys A¹-homotopy theory:*

On *page 48*, the first Lemma is shown. Without proof - so I will try to illuminate things a little bit by giving the proof. This lemma isn't used until section 3, so you can skip it, if you want to. I suggest not to do so, if you are intimidated by the diagram, because it isn't that hard, and it's a nice exercise to get the concepts in your head right.

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Category: English, Walkthrough to A1-Homotopy Theory | 5 Comments