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Cohomology group of a submanifold or Lie subgroup

In general: if one knows the cohomology group of some manifold ${\cal M}$, i.e. $H^n ({\cal M})$, are there known results for the same cohomology group $H^n (X)$ of a submanifold $X \subset {\cal M}$? …
cherzieandkressy's user avatar