Hell every body, do you know what is a Koszul connexion please? WIkipédia francais is not clear about that for me. I just know if I have a vectorial bundle [tex]\pi : E \rightarrow B[/tex], a vectorial field X on B and a section S on B. A connexion associate at those 2 object an other section. But it's nt clear. Thank you in advance and have a nice afternoon.