Exponentially many nonisomorphic orientable triangular embeddings of image Original Research Article

It was proved earlier that there are constants M, image such that for every image (resp., every image, image) there are at least image nonisomorphic nonorientable (resp., orientable) genus embeddings of image. In the present paper we show that for image there are at least image nonisomorphic OT-embeddings of image. As a byproduct, we give a relatively simple method of constructing index four current graphs with current group image generating orientable triangular embeddings of image.