Differential topology.

Algebraic topology > Homology and cohomology theories > Bordism and cobordism theories and formal group laws in algebraic topology.

Algebraic topology > Homotopy groups > Stable homotopy of spheres.

Global analysis, analysis on manifolds > General theory of differentiable manifolds > Differentiable manifolds, foundations.

Global analysis, analysis on manifolds > General theory of differentiable manifolds > Real-analytic and Nash manifolds [See also 14P20, 32C07].

Manifolds and cell complexes > Differential topology > Immersions in differential topology.

Manifolds and cell complexes > Differential topology > Surgery and handlebodies.