Normal 1-types of 4-manifolds (Ex)

Determine the normal 1-type of the following manifolds

1. Tex syntax error

   $<wikitex>; Determine the normal 1-type of the following manifolds # $M$ simply connected and spin; # $M$ simply connected and non-spin; # $M$ spin. For further computations of normal 1-types of 4-manifolds, see {{cite|Teichner1992|Section 2}}. </wikitex> [[Category:Exercises]] [[Category:Exercises without solution]]M$ simply connected and spin;

2. Tex syntax error

   $M$ simply connected and non-spin;

3. Tex syntax error

   $M$ spin.

For further computations of normal 1-types of 4-manifolds, see [Teichner1992, Section 2].