1 “... of a Chern character on the Grothendieck group of coherent sheaves of a compact complex manifold...”

2 “.... The hypoelliptic Laplacian, a second-order operator acting on the cotangent bundle of a compact manifold...”

3 “... of cohomology classes in Bott–Chern cohomology, which is a refinement for complex manifolds of de Rham...”