Auroux, DenisMuñoz, VicentePresas, Francisco2023-06-202023-06-2020051527-5256https://hdl.handle.net/20.500.14352/50612Given a Lagrangian submanifold in a symplectic manifold and a Morse function on the submanifold, we show that there is an isotopic Morse function and a symplectic Lefschetz pencil on the manifold extending the Morse function to the whole manifold. From this construction,we define a sequence of symplectic invariants classifying the isotopy classes of Lagrangian spheres in a symplectic 4-manifold.engjournal articlehttp://projecteuclid.org/DPubS/Repository/1.0/Disseminate?view=body&id=pdf_1&handle=euclid.jsg/1144947795http://projecteuclid.orgrestricted access514SymplecticLefschetz pencilLagrangian submanifoldGeometría1204 Geometría