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Let $\dot{x}(t) \in F(x(t)$$\dot{x}(t) \in F(x(t))$ be a differential inclusion, with $F: \mathbb{R}^n \rightrightarrows \mathbb{R}^n$ an uppersemicontinuous, convex and compact valued set-valued map.

On wikipediaWikipedia it is said that such an inclusion always admits a local solution (i.e. on an interval $[0, \epsilon($$[0, \epsilon)$ ), and if such a solution does not blow up, then we can extend it to a global solution (i.e. on $[0, +\infty)$ ). Such a result seems quite intuitive, and I believe has a simple proof.

Is there any reference where such a result is explicitly stated? I have only managed to found some reference which impose conditions on $F$.

Any help would be appreciated.

EDIT: Actually, looking at the proof of (local) existence in Aubin-Cellina, I am no longer sure that this is true. However, I am not able to construct a counterexample.

Let $\dot{x}(t) \in F(x(t)$ be a differential inclusion, with $F: \mathbb{R}^n \rightrightarrows \mathbb{R}^n$ an uppersemicontinuous, convex and compact valued set-valued map.

On wikipedia it is said that such an inclusion always admits a local solution (i.e. on an interval $[0, \epsilon($ ) and if such a solution does not blow up, then we can extend it to a global solution (i.e. on $[0, +\infty)$ ). Such a result seems quite intuitive, and I believe has a simple proof.

Is there any reference where such a result is explicitly stated? I have only managed to found some reference which impose conditions on $F$.

Any help would be appreciated.

EDIT: Actually, looking at the proof of (local) existence in Aubin-Cellina, I am no longer sure that this is true. However, I am not able to construct a counterexample.

Let $\dot{x}(t) \in F(x(t))$ be a differential inclusion, with $F: \mathbb{R}^n \rightrightarrows \mathbb{R}^n$ an uppersemicontinuous, convex and compact valued set-valued map.

On Wikipedia it is said that such an inclusion always admits a local solution (i.e. on an interval $[0, \epsilon)$ ), and if such a solution does not blow up, then we can extend it to a global solution (i.e. on $[0, +\infty)$ ). Such a result seems quite intuitive, and I believe has a simple proof.

Is there any reference where such a result is explicitly stated? I have only managed to found some reference which impose conditions on $F$.

Any help would be appreciated.

EDIT: Actually, looking at the proof of (local) existence in Aubin-Cellina, I am no longer sure that this is true. However, I am not able to construct a counterexample.

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J. Doe
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Let $\dot{x}(t) \in F(x(t)$ be a differential inclusion, with $F: \mathbb{R}^n \rightrightarrows \mathbb{R}^n$ an uppersemicontinuous, convex and compact valued set-valued map.

On wikipedia it is said that such an inclusion always admits a local solution (i.e. on an interval $[0, \epsilon($ ) and if such a solution does not blow up, then we can extend it to a global solution (i.e. on $[0, +\infty)$ ). Such a result seems quite intuitive, and I believe has a simple proof.

Is there any reference where such a result is explicitly stated? I have only managed to found some reference which impose conditions on $F$.

Any help would be appreciated.

EDIT: Actually, looking at the proof of (local) existence in Aubin-Cellina, I am no longer sure that this is true. However, I am not able to construct a counterexample.

Let $\dot{x}(t) \in F(x(t)$ be a differential inclusion, with $F: \mathbb{R}^n \rightrightarrows \mathbb{R}^n$ an uppersemicontinuous, convex and compact valued set-valued map.

On wikipedia it is said that such an inclusion always admits a local solution (i.e. on an interval $[0, \epsilon($ ) and if such a solution does not blow up, then we can extend it to a global solution (i.e. on $[0, +\infty)$ ). Such a result seems quite intuitive, and I believe has a simple proof.

Is there any reference where such a result is explicitly stated? I have only managed to found some reference which impose conditions on $F$.

Any help would be appreciated.

Let $\dot{x}(t) \in F(x(t)$ be a differential inclusion, with $F: \mathbb{R}^n \rightrightarrows \mathbb{R}^n$ an uppersemicontinuous, convex and compact valued set-valued map.

On wikipedia it is said that such an inclusion always admits a local solution (i.e. on an interval $[0, \epsilon($ ) and if such a solution does not blow up, then we can extend it to a global solution (i.e. on $[0, +\infty)$ ). Such a result seems quite intuitive, and I believe has a simple proof.

Is there any reference where such a result is explicitly stated? I have only managed to found some reference which impose conditions on $F$.

Any help would be appreciated.

EDIT: Actually, looking at the proof of (local) existence in Aubin-Cellina, I am no longer sure that this is true. However, I am not able to construct a counterexample.

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J. Doe
  • 115
  • 8

Existence of a global solution to a differential inclusion that does not blow up

Let $\dot{x}(t) \in F(x(t)$ be a differential inclusion, with $F: \mathbb{R}^n \rightrightarrows \mathbb{R}^n$ an uppersemicontinuous, convex and compact valued set-valued map.

On wikipedia it is said that such an inclusion always admits a local solution (i.e. on an interval $[0, \epsilon($ ) and if such a solution does not blow up, then we can extend it to a global solution (i.e. on $[0, +\infty)$ ). Such a result seems quite intuitive, and I believe has a simple proof.

Is there any reference where such a result is explicitly stated? I have only managed to found some reference which impose conditions on $F$.

Any help would be appreciated.