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mkumar441
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please solve this ...
suppose A and B are n by n matrices,and AB=I.prove from rank(AB)<=rank(A) that the rank of A is n . So A is invertible and B must be its twosided inverse. Therefore BA=I(Which is not obvious!).
 2 years ago
 2 years ago
mkumar441 Group Title
please solve this ... suppose A and B are n by n matrices,and AB=I.prove from rank(AB)<=rank(A) that the rank of A is n . So A is invertible and B must be its twosided inverse. Therefore BA=I(Which is not obvious!).
 2 years ago
 2 years ago

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mathslover Group TitleBest ResponseYou've already chosen the best response.1
So what we have to do .. ?
 2 years ago

mathslover Group TitleBest ResponseYou've already chosen the best response.1
ok sorry wait
 2 years ago

mathslover Group TitleBest ResponseYou've already chosen the best response.1
as given that A is n by n, rank(A) \(\le\) n and conversely : n = rank(\(I_n\))=rank(AB)\(\le\)rank(A)
 2 years ago

mathslover Group TitleBest ResponseYou've already chosen the best response.1
got my point @mkumar441 ?
 2 years ago

mkumar441 Group TitleBest ResponseYou've already chosen the best response.0
yes i got it thank you for ur quick response
 2 years ago

mathslover Group TitleBest ResponseYou've already chosen the best response.1
Your welcome dear.. also: \[\huge{\mathbb{WE}\textbf{LC}\mathcal{OME}\space\textit{TO OPENSTUDY}}\]
 2 years ago

mkumar441 Group TitleBest ResponseYou've already chosen the best response.0
i need small favour at wat timings do u present inorder post questions.
 2 years ago

mathslover Group TitleBest ResponseYou've already chosen the best response.1
i didn't get you .. it seems that you are Indian. You can ask in Hindi?
 2 years ago

mkumar441 Group TitleBest ResponseYou've already chosen the best response.0
yes i am indian but i dont Hindi.When do you be in online inorder to clarifiy my doubts?
 2 years ago

mathslover Group TitleBest ResponseYou've already chosen the best response.1
ok i got you now: actually i am present here from 3:00 PM to 9:00 PM (Indian Standard Time_ or there may be breaks but yes: There are gr8 experts present you don't need to care for your clarification of doubts. In case, if your doubt is not answered then you can post the link of your question in the chat. or tag some people having good smart score....
 2 years ago

mathslover Group TitleBest ResponseYou've already chosen the best response.1
lemme introduce you to some experts for your future help: experimentx mukushla Vaidehi09 amistre64 vishweshshrimali5 unklerhaukus and many more
 2 years ago

mathslover Group TitleBest ResponseYou've already chosen the best response.1
just put @ sign before there names and they will be looking on your question as soon as possible.
 2 years ago

mkumar441 Group TitleBest ResponseYou've already chosen the best response.0
Another question ..Suppose A is an m by n matrix of rank r.Its reduced echelon form is R. Describe exactly reduced row echelon form of R transpose (not A transpose).
 2 years ago

mathslover Group TitleBest ResponseYou've already chosen the best response.1
Post that as a new question and tag me there.. I will help you there
 2 years ago
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