Example image of eyePlorer eyePlorer map for 'Euler class': Algebraic topology Characteristic class Leonhard Euler Mathematics Vector bundle Euler characteristic Manifold Tangent bundle Cohomology Orientation Thom space Direct sum of modules Generic property Codimension Homology (mathematics) Poincaré duality Intersection theory (mathematics) Normal bundle Stiefel–Whitney class Chern class Pontryagin class Alternating polynomial Discriminant Splitting principle Symmetric polynomial Vandermonde polynomial Stable homotopy theory Classifying space Classifying space for O(n) K-theory Gysin sequence Symplectic sum Affine manifold Circle bundle Section (fiber bundle) Gromov–Witten invariant Connected sum Pfaffian Classifying space for U(n) Transversality Fiber bundle