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algebraic geometry

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algebraic geometry

if we let {U_i} be the usual open covering of P^r (projective space)and F be a coherent sheaf on P^n, How can we show that Cech cohomology with coefficients in F calculated using the covering gives the cohomolgy of P^r. Can we conclude that H^n(P^r, F) = 0 for n>r

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