Recent content by ramtin

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    Solving Nonhomogeneous Heat Equation with Fourier Transform

    The integrating factor is : e^{\int(\omega^2 +1)dt} but I don't know what to do next
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    Finding Bessel Solutions for a Differential Equation with a Transformed Format

    it was y'+by^2=cx^m ,Iforgot to type the y squared power
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    Finding Bessel Solutions for a Differential Equation with a Transformed Format

    Homework Statement u''-bc (x^m) u =0Homework Equations How can I write the general solution in terms of Bessel function?The Attempt at a Solution This form is a transformed vresion of y'+by^2=cx^m with dummy variable by=1/u *du/dx
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    A^k matrix singularity and (A^k)^-1 = (A^-1)^k

    I can't prove it for 2 ,,,don't know How to generalize that:cry:
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    A^k matrix singularity and (A^k)^-1 = (A^-1)^k

    You answer was not complete ...What are the * ? Please somebody help me!
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    A^k matrix singularity and (A^k)^-1 = (A^-1)^k

    Homework Statement Let A be nonsingular. Prove That for any positive integer k , A^k is nonsingular, And (A^k)^-1 = (A^-1)^k. Homework Equations The Attempt at a Solution