Punti doppi isolati non normali di superfici di ![ℙ<sup>4</sup>](http://212.189.136.205/plugins/generic/latexRender/cache/b2aa923a1a8b5cd88d3ac27d46875f7e.png)
Abstract
In this note we establish some properties concerning non proper double points of the first and second kind of a surface in
, without assuming that the surface is a projection from
to
of an algebraic irreducible non singular surface.In particular we show that these points are not normal ones.
![ℙ<sup>4</sup>](http://212.189.136.205/plugins/generic/latexRender/cache/b2aa923a1a8b5cd88d3ac27d46875f7e.png)
![ℙ<sup>5</sup>](http://212.189.136.205/plugins/generic/latexRender/cache/262c0e191900f08a961393ab12dcd474.png)
![ℙ<sup>4</sup>](http://212.189.136.205/plugins/generic/latexRender/cache/b2aa923a1a8b5cd88d3ac27d46875f7e.png)
DOI Code:
10.1285/i15900932v3n2p297
Full Text: PDF