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54 f(y,~r+l)and ~" by s(97-0, / ~ ( Y , ~ ) ) H~ F (y,~r)).

4. 35 - An example In complex k-space, group of points is an exact Ck, all of whose co-ordinates subThere are integers. ,ex 2~ Zk). C k as a group of complex Z k is invariant induced under a left action with this itself, and We fix a left linear automorphism~ action of~. There of ~r~on G as a group of automorphisms. Consider then a left action compact analytic manifold tions. Fix a covering Let K be the nerve ~f an element empty section with of the vertices let~(Q-) Sup set, operators ~ - - > maps (~-)~ (Q-) covering.

This time there are four equivalent definitions of the p-cochains. i) A p-cochain is a function y bp, assigns an e l e m e n t ~ ( b p ) ~ ( I b p l 2) ). A p-cochain is a function ~ w h i c h assigns an element / r if which to each basic p-chain, ~ to each ~ 6 in Homz(~(Bp(~r-),#(~r-)) so that a--'C O-- then the diagram I(o-) Bp (Or-) > (~) B ~--') >~ (~-') commutes. 3) Ap coc ain is a function / w h i c h assigns that if ~-' ~ ~-- VC the diagram / to each j - Cp (~--) C P (or-') 34 - >H~ AO-' ) ~Gr-)) >Hom z ( ~ / p (~'~ ' ~ - ' ) ) commute s.

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