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Introduction - index

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92 IV. Dimension<br />

On se propose de comparer les dimensions de X, Y et des fibres.<br />

Example 3.1. On considere la projection (f> : k n+d —> k n donnee par<br />

les n premieres coordonnees. La fibre d'un point quelconque de k n est<br />

isomorphe a k d . On a done ici la relation :<br />

Cette relation est la relation attendue, mais il convient de prendre quelques<br />

precautions.<br />

Exemple 3.2. Si Im

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