1 

     2 

     2 %%%%% excerpts from KW's include file of standard macros

     3 %%%%% excerpts from KW's include file of standard macros

     3 

     4 

     4 \def\z{\mathbb{Z}}

     5 \def\z{\mathbb{Z}}

     5 \def\r{\mathbb{R}}

     6 \def\r{\mathbb{R}}