If $x(0)=\int_{0}^{T} A(t)y(t)dt-\int_{t=0}^{T}\int_{s=0}^{t} B(t, s)f(s, x(s))\hspace{0.1 cm}ds \hspace{0.1 cm}dt,$ where $A(t),$ $B(t, s)$ are the known $n \times m$ and $n \times n$ matrices respectively, $y(t)$ and $f(s, x(s))$ are the vectors in $\mathbb{R}^m$ and $\mathbb{R}^n$ respectively. Then my question is under what conditions for each $y(t)$ the above equation has the unique value of $x(0)?$?
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Where does this problem come from? I suspect a differential equation is lurking behind this equation, so meybe start with that? – TZakrevskiy Feb 07 '17 at 13:51
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Yes, it is about the problem in differential equation. – thomus Feb 07 '17 at 13:54
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question is under what conditions on the function f, for each given y(t), x(0) will exists and it is unique. – thomus Feb 07 '17 at 13:55
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where f is a nonlinear continuous function. – thomus Feb 07 '17 at 13:56
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Could you write down this differential equation? – TZakrevskiy Feb 07 '17 at 14:28