Díaz Díaz, Jesús IldefonsoHenry, J.Ramos Del Olmo, Ángel Manuel2023-06-202023-06-2019980095-461610.1007/s002459900069https://hdl.handle.net/20.500.14352/57386We prove the approximate controllability of several nonlinear parabolic boundary-value problems by means of two different methods: the first one can be called a Cancellation method and the second one uses the Kakutani fixed-point theorem.engjournal articlehttp://www.springerlink.com/content/8b88rvgkhuyhn45c/fulltext.pdfhttp://www.springerlink.com/restricted access517.956.4approximate controllabilitysemilinear parabolic boundary-value problemsinterior or boundary controlsheat-equationGeometria algebraica1201.01 Geometría Algebraica