Example image of eyePlorer eyePlorer map for 'Almost complex manifold': Differentiable manifold Linear complex structure Mathematics Tangent space Complex manifold Manifold Symplectic geometry Charles Ehresmann Heinz Hopf Linear map Isomorphism Smooth function Tangent bundle Tensor field Vector bundle Orientability Linear algebra Reduction of the structure group Algebraic topology Sphere Riemann sphere Octonion Imaginary unit Cotangent bundle Differential form Exterior algebra Direct sum of modules Exterior derivative Dolbeault operator Identity map Lie derivative Vector field Analytic function Frobenius theorem (differential topology) Hermitian manifold Kähler manifold Generalized complex structure Nigel Hitchin Subspace Isotropy Complex conjugate Subbundle Courant bracket Pure spinor Albert Nijenhuis Hypercomplex manifold Pseudoholomorphic curve Gromov's compactness theorem (topology) Hermitian connection Séminaire Nicolas Bourbaki (1950–1959)