Recent content by Ami

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    Proof of B=A^-1 for Invertible Matrix

    Yes.but it can be valid if we show that A is invertible. There was another part of this problem,but it was about BA=I,The reference book solved it like the way I've written above. But It was easier:_ To show that A is invertible: We can show that AX=0, have only the trivial solution:_ So...
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    Proof of B=A^-1 for Invertible Matrix

    I'm sorry.I need to slove this problem without using the determinants. My attempt at the solution is:_ First: If A is invertible:- By multiplying by A^-1 on both sides on the left:_ (A^-1)(AB)=(A^-1)I IB=A^-1 B=A^-1 Second: I need to show now, that A is invertible, to complete the...
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    Proof of B=A^-1 for Invertible Matrix

    Thanks. But can you show me the solution more clearly ,please? I still confused about it.
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    Proof of B=A^-1 for Invertible Matrix

    Can you please show me how I can prove this?
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    Proof of B=A^-1 for Invertible Matrix

    Thanks so much to all of for replying The main problem is to show that A is invertible than I can show That [B=A^-1] easily
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    Proof of B=A^-1 for Invertible Matrix

    Homework Statement Let A be a square matrix. If B is a square matrix satisfying AB=I Homework Equations Proof that B=A^-1 The Attempt at a Solution
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    Help With Integral Problem - Double Integration?

    Great ideas,especially that one about cheating:smile: :wink: I will try this one,because I can't use Mathematica package right now. And we will see:rolleyes: Thanks for your great help.
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    Help With Integral Problem - Double Integration?

    Thank you very much for the wonderful site,and for replying. I've tried it,and I saw the result. But as you said,I want to figure out how to get by hand the result. I still need help.
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    Help With Integral Problem - Double Integration?

    Maybe we need "douple integration" here.
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    Help With Integral Problem - Double Integration?

    I tried this step,but I couldn't continue. Thanks for your reply "Hootenanny"
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    Help With Integral Problem - Double Integration?

    I'm really sorry. I've written the problem down uncorrectly:confused: This is the right one:_ http://www4.0zz0.com/2007/02/16/21/95988123.bmp sorry.And thanks for your replies.
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    Help With Integral Problem - Double Integration?

    Homework Statement http://www4.0zz0.com/2007/02/16/20/74624071.bmp Homework Equations Can anybody help me with this integral problem?Please. The Attempt at a Solution Is the only solution by the "douple integration" method ?
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    Derivation of "continuity equation"

    Thank you very much for your reply It has been very helpful to me. And I've finished deriving the equation. Thanks a lot
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    Derivation of "continuity equation"

    Hello, I need the derivation of "continuity equation" by the current density equation,in Quantum Mechanics. I really need this derivation quickly,please Thanks
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