Çò Øøø Ý Blockinðð Àóñóðóóý Óó Êêòòòò Ëô Blockin Blockin× Òò Ë Blockin Blockin Blockinññ×

We prove that the cyclic homology of a scheme with an ample line bundle coincides with the cyclic homology of its category of algebraic vector bundles. As a byproduct of the proof, we obtain a new construction of the Chern character of a perfect complex on a ringed space. Subject classification: 16E40 (Primary), 18E30, 14F05 (Secondary).