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Mathematics 17 Online
OpenStudy (anonymous):

What's the difference between INTERNAL and EXTERNAL direct sums?

OpenStudy (mayankdevnani):

An internal direct sum is simply a direct sum of sub-objects of an object. By contrast, a direct sum of two objects which are not sub-objects of a common object is an external direct sum.

OpenStudy (mayankdevnani):

@extremity

OpenStudy (mayankdevnani):

http://en.wikipedia.org/wiki/Direct_sum

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