Recent content by Feynman

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    Graduate Is Sami Groupes Theory the Best Method for Solving Parabolic Problems?

    sami groupes theory, it is the best method for solving parabolic problem
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    Graduate Understanding Smooth Solutions to PDEs

    It depend if your are working on Sobolev sapces or others
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    Graduate How is exp(tL) rigorously defined in Duhamel's formula?

    HallsofIvy, that is not difficult like you see! by semigroupe theory the expression e^{tL}f is the solution of the differential equation on Banach space : u'+Lu=0, u(0)=f, so for example for the laplacian, e^{t\Delta}f is the solution of the Heat equation (for Dirichlet or Neumann...
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    Graduate How is exp(tL) rigorously defined in Duhamel's formula?

    e^{tL} is the semi groupe of $L$, you can see this theory on http://cantor.mathematik.uni-ulm.de/m5/index.php?file=arendt/index.htmlt
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    Graduate A PDE and Linear operator questions.

    you can apply the weak formulation on the 2 equations and compare it
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    Graduate Solving Conventional PDEs: Separation of Variables and Eigen Theory

    It solve by which space you choose? if continuous functions ok no problem but if you solve on other spaces like sobolev spaces, in this case your method will not be avalable
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    Undergrad Good text for a second course on ODES?

    you can see this page`:http://www.ma3n.org/pages/jazar/MaPage.html and "ODE"
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    Graduate Partial differential equation problem

    You must presise your space (sobolev, holder, besov,...) and your boundary conditions
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    Graduate Physical interpretation of Feynman path integral

    So did the relativistic effect change the form and the physical sens of feynman path integral?
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    High School How Do You Factorize X^4+X^3+X^2+X+1?

    I Arrivided To X^5-1 So How To Factorise It?
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    High School How Do You Factorize X^4+X^3+X^2+X+1?

    So i need how factorize it in details
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    High School How Do You Factorize X^4+X^3+X^2+X+1?

    How please? can you clarify?
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    High School How Do You Factorize X^4+X^3+X^2+X+1?

    Hello , how to factorize the folowing polynomial X^4+X^3+X^2+X+1
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    Graduate PDE: If u is a solution to a certain bound problem, question about laplacian u

    Calvino, spesify your question?
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    Graduate Is the heat equation well posed?

    You must presise your Boundary conditions