Recent content by yooyo

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    Graduate How Do You Solve Norm and Matrix Approximation Problems in Linear Algebra?

    Q1: how do we find a vector x so that ||A|| = ||Ax||/||x||(using the infinite norm) totally no clue on this question.. Q2: Suppose that A is an n×n invertible matrix, and B is an approximation of A's inverse A^-1 such that AB = I + E for some matrix E. Show that the relative error in...
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    Undergrad How to make a matrix B such that AB=BA

    it is given A find B such that AB=BA.. what is the obvious choice...
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    Undergrad How to make a matrix B such that AB=BA

    what do you mean by 2Id? 2xI?
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    Undergrad How to make a matrix B such that AB=BA

    B is not the identity matrix or the zero matrix suppose both A and B are 3X3 I don't have clue on this..any hits?
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    Java How to get Color from RGB value in JAVA

    oh right.. I was looking for the method, the Color has a constructor which is Color(int r, int g, int b) Creates an opaque sRGB color with the specified red, green, and blue values in the range (0 - 255). another question is how do I control the image transparency?
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    Java How to get Color from RGB value in JAVA

    Is there any way to get color from RGB value? for example If I give some random RGB value like r=221 g=255 b=123 then how do I get the color associated this RGB value? Thanks in advance.
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    Undergrad Could a set of n verctors in Rm span all of Rm when n<m?

    Could a set of n verctors in Rm span all of Rm when n<m? any hits? kinda confused with this span thing.:confused: