We show that any Heegaard splitting of the pair of the solid torus (≅D2xS1) and its core loop (an interior point xS1) is standard, using the notion of Heegaard splittings of pairs of 3-manifolds and properly imbedded graphs, which is defined in this paper.
@article{urn:eudml:doc:44536, title = {Heegaard splittings of the pair of solid torus and the core loop.}, journal = {Revista Matem\'atica de la Universidad Complutense de Madrid}, volume = {14}, year = {2001}, pages = {479-501}, zbl = {0996.57012}, mrnumber = {MR1871309}, language = {en}, url = {http://dml.mathdoc.fr/item/urn:eudml:doc:44536} }
Hayashi, Chuichiro; Shimokawa, Koya. Heegaard splittings of the pair of solid torus and the core loop.. Revista Matemática de la Universidad Complutense de Madrid, Tome 14 (2001) pp. 479-501. http://gdmltest.u-ga.fr/item/urn:eudml:doc:44536/