W={(x,y): y=ax, a is an integer}, V=R^(2)

It is not a subspace of V, but I can't find an example, where this is not valid.

Please, help. Thank you.

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- July 3rd 2011, 10:45 AMJavDetermine whether W is a subspace of the vector space?
W={(x,y): y=ax, a is an integer}, V=R^(2)

It is not a subspace of V, but I can't find an example, where this is not valid.

Please, help. Thank you. - July 3rd 2011, 10:50 AMIsomorphismRe: Determine whether W is a subspace of the vector space?
- July 3rd 2011, 11:00 AMJavRe: Determine whether W is a subspace of the vector space?
Thank you very much for your prompt response.

I forgot that cu + cv has to be in W as well.

Thank you again.