Is arbitrary direct sum of vector spaces vector space?












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Suddenly thinking about arbitrary direct sum of the real numbers R, I came across this question. Can someone answer this?










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    The answer is yes.
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    – Hanul Jeon
    Dec 26 '18 at 9:46






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    Yes, it is... if the factors are vector spaces over the same field . Whether you're thinking of internal direct sum (of subspaces of some space) or external one with the obvious definition, it is always a linear space
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    – DonAntonio
    Dec 26 '18 at 9:47












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    Welcome to MSE. The title of a question should not be its first sentence.
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    – José Carlos Santos
    Dec 26 '18 at 9:55
















0












$begingroup$


Suddenly thinking about arbitrary direct sum of the real numbers R, I came across this question. Can someone answer this?










share|cite|improve this question









$endgroup$








  • 1




    $begingroup$
    The answer is yes.
    $endgroup$
    – Hanul Jeon
    Dec 26 '18 at 9:46






  • 1




    $begingroup$
    Yes, it is... if the factors are vector spaces over the same field . Whether you're thinking of internal direct sum (of subspaces of some space) or external one with the obvious definition, it is always a linear space
    $endgroup$
    – DonAntonio
    Dec 26 '18 at 9:47












  • $begingroup$
    Welcome to MSE. The title of a question should not be its first sentence.
    $endgroup$
    – José Carlos Santos
    Dec 26 '18 at 9:55














0












0








0





$begingroup$


Suddenly thinking about arbitrary direct sum of the real numbers R, I came across this question. Can someone answer this?










share|cite|improve this question









$endgroup$




Suddenly thinking about arbitrary direct sum of the real numbers R, I came across this question. Can someone answer this?







linear-algebra






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share|cite|improve this question










asked Dec 26 '18 at 9:40









Debayan GoswamiDebayan Goswami

11




11








  • 1




    $begingroup$
    The answer is yes.
    $endgroup$
    – Hanul Jeon
    Dec 26 '18 at 9:46






  • 1




    $begingroup$
    Yes, it is... if the factors are vector spaces over the same field . Whether you're thinking of internal direct sum (of subspaces of some space) or external one with the obvious definition, it is always a linear space
    $endgroup$
    – DonAntonio
    Dec 26 '18 at 9:47












  • $begingroup$
    Welcome to MSE. The title of a question should not be its first sentence.
    $endgroup$
    – José Carlos Santos
    Dec 26 '18 at 9:55














  • 1




    $begingroup$
    The answer is yes.
    $endgroup$
    – Hanul Jeon
    Dec 26 '18 at 9:46






  • 1




    $begingroup$
    Yes, it is... if the factors are vector spaces over the same field . Whether you're thinking of internal direct sum (of subspaces of some space) or external one with the obvious definition, it is always a linear space
    $endgroup$
    – DonAntonio
    Dec 26 '18 at 9:47












  • $begingroup$
    Welcome to MSE. The title of a question should not be its first sentence.
    $endgroup$
    – José Carlos Santos
    Dec 26 '18 at 9:55








1




1




$begingroup$
The answer is yes.
$endgroup$
– Hanul Jeon
Dec 26 '18 at 9:46




$begingroup$
The answer is yes.
$endgroup$
– Hanul Jeon
Dec 26 '18 at 9:46




1




1




$begingroup$
Yes, it is... if the factors are vector spaces over the same field . Whether you're thinking of internal direct sum (of subspaces of some space) or external one with the obvious definition, it is always a linear space
$endgroup$
– DonAntonio
Dec 26 '18 at 9:47






$begingroup$
Yes, it is... if the factors are vector spaces over the same field . Whether you're thinking of internal direct sum (of subspaces of some space) or external one with the obvious definition, it is always a linear space
$endgroup$
– DonAntonio
Dec 26 '18 at 9:47














$begingroup$
Welcome to MSE. The title of a question should not be its first sentence.
$endgroup$
– José Carlos Santos
Dec 26 '18 at 9:55




$begingroup$
Welcome to MSE. The title of a question should not be its first sentence.
$endgroup$
– José Carlos Santos
Dec 26 '18 at 9:55










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