👉 Kay math, or Kähler geometry, is a branch of differential geometry that combines complex analysis and symplectic geometry, focusing on manifolds equipped with a Kähler metric—a special type of Riemannian metric that also provides a compatible complex structure. This means the metric preserves the complex structure, allowing for a rich interplay between the manifold's geometry and its complex analytic properties. Key features include the existence of a closed, non-degenerate 2-form (the Kähler form) that links the metric and complex structure, enabling powerful tools like Hermitian differentials and the Cartan-Schwarz lemma. It generalizes complex manifolds to higher dimensions, offering insights into curvature (e.g., the Calabi-Yau condition for Ricci-flatness) and applications in string theory, mirror symmetry, and algebraic geometry, making it a vital framework for understanding spaces with both geometric and analytic depth.