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This paper contains the algebraic analog for idempotent matrices of the Chern-Weil theory of characteristic classes. This is used to show, algebraically, that the canonical line bundle on the complex projective space is not stably trivial. Also a theorem is proved saying that for any smooth manifold there is a canonical epimorphism from the even dimensional algebraic de Rham cohomology of its algebra of smooth functions onto the standard even dimensional de Rham cohomology of the manifold.
@article{Gómez1992, abstract = {This paper contains the algebraic analog for idempotent matrices of the Chern-Weil theory of characteristic classes. This is used to show, algebraically, that the canonical line bundle on the complex projective space is not stably trivial. Also a theorem is proved saying that for any smooth manifold there is a canonical epimorphism from the even dimensional algebraic de Rham cohomology of its algebra of smooth functions onto the standard even dimensional de Rham cohomology of the manifold.}, author = {Gómez, Francisco}, journal = {Publicacions Matemàtiques}, keywords = {Chern-Weil theory; characteristic classes; canonical line bundle; de Rham cohomology}, language = {eng}, number = {2A}, pages = {601-608}, title = {Algebraic characteristic classes for idempotent matrices.}, url = {http://eudml.org/doc/41737}, volume = {36}, year = {1992}, }
TY - JOUR AU - Gómez, Francisco TI - Algebraic characteristic classes for idempotent matrices. JO - Publicacions Matemàtiques PY - 1992 VL - 36 IS - 2A SP - 601 EP - 608 AB - This paper contains the algebraic analog for idempotent matrices of the Chern-Weil theory of characteristic classes. This is used to show, algebraically, that the canonical line bundle on the complex projective space is not stably trivial. Also a theorem is proved saying that for any smooth manifold there is a canonical epimorphism from the even dimensional algebraic de Rham cohomology of its algebra of smooth functions onto the standard even dimensional de Rham cohomology of the manifold. LA - eng KW - Chern-Weil theory; characteristic classes; canonical line bundle; de Rham cohomology UR - http://eudml.org/doc/41737 ER -