Stability of solutions of the porous medium equation with growth with respect to the diffusion exponent
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866913288159232000 |
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| author | Dębiec, Tomasz Gwiazda, Piotr Miasojedow, Błażej Szymańska, Zuzanna |
| author_facet | Dębiec, Tomasz Gwiazda, Piotr Miasojedow, Błażej Szymańska, Zuzanna |
| contents | We consider a macroscopic model for the growth of living tissues incorporating pressure-driven dispersal and pressure-modulated proliferation. Assuming a power-law relation between the mechanical pressure and the cell density, the model can be expressed as the porous medium equation with a growth term. We prove Hölder continuous dependence of the solutions of the model on the diffusion exponent. The main difficulty lies in the degeneracy of the porous medium equations at vacuum. To deal with this issue, we first regularise the equation by shifting the initial data away from zero and then optimise the stability estimate derived in the regular setting. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2403_19070 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Stability of solutions of the porous medium equation with growth with respect to the diffusion exponent Dębiec, Tomasz Gwiazda, Piotr Miasojedow, Błażej Szymańska, Zuzanna Analysis of PDEs Numerical Analysis Quantitative Methods We consider a macroscopic model for the growth of living tissues incorporating pressure-driven dispersal and pressure-modulated proliferation. Assuming a power-law relation between the mechanical pressure and the cell density, the model can be expressed as the porous medium equation with a growth term. We prove Hölder continuous dependence of the solutions of the model on the diffusion exponent. The main difficulty lies in the degeneracy of the porous medium equations at vacuum. To deal with this issue, we first regularise the equation by shifting the initial data away from zero and then optimise the stability estimate derived in the regular setting. |
| title | Stability of solutions of the porous medium equation with growth with respect to the diffusion exponent |
| topic | Analysis of PDEs Numerical Analysis Quantitative Methods |
| url | https://arxiv.org/abs/2403.19070 |