On the number of limit cycles for the quadratic systems with a weak focus and a strong focus (Q5943376)
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scientific article; zbMATH DE number 1649223
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | On the number of limit cycles for the quadratic systems with a weak focus and a strong focus |
scientific article; zbMATH DE number 1649223 |
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On the number of limit cycles for the quadratic systems with a weak focus and a strong focus (English)
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29 September 2002
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The authors prove that the quadratic system with weak and strong foci has at most one limit cycle around the strong focus and a \((1,1)\)-distribution (or \((0,1)\)-distribution) of limit cycles, since the weak focus is a focus of 2nd (or 3rd) order.
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quadratic differential system
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weak focus
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strong focus
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limit cycle
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