Make a list of units in Z20 and verify that they all map to units in Z4. Show that ther is a non-unit in Z20 that maps to a unit in Z4. Please help... No idea how to do this... Thanks in advance for any help
Follow Math Help Forum on Facebook and Google+
Originally Posted by jzellt Make a list of units in Z20 and verify that they all map to units in Z4. Show that ther is a non-unit in Z20 that maps to a unit in Z4. Please help... No idea how to do this... Thanks in advance for any help is a unit . Therefore the group of units of is . . Now what kind of map are we talking about here? An isomorphism?
I'm not really sure what is meant by "map" either, but thanks for the reply. This will at least get me started...
View Tag Cloud