How many group homomorphism are there from $ \mathbb{Z}_{20} $ onto $ \mathbb{Z}_{8} $? How many are there to $ \mathbb{Z}_{8} $ ?
In first question is onto but second question is to what is the difference between two question?
How many group homomorphism are there from $ \mathbb{Z}_{20} $ onto $ \mathbb{Z}_{8} $? How many are there to $ \mathbb{Z}_{8} $ ?
In first question is onto but second question is to what is the difference between two question?
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