TY - JOUR T1 - Uniqueness of the Solutions of ut=Δum and ut=Δum-up with Initial Datum a Measure: the Fast Diffusion Case AU - Zhao Junning, Yuan Hongjun JO - Journal of Partial Differential Equations VL - 2 SP - 143 EP - 159 PY - 1994 DA - 1994/07 SN - 7 DO - http://doi.org/ UR - https://global-sci.org/intro/article_detail/jpde/5678.html KW - Porous medium equation KW - Cauchy problem KW - initial datum a measure KW - uniqueness AB - In this paper, we study the Cauchy problems u_t = Δu^m \quad u(x, 0) = μ and u_t = Δu^m - u^p \quad u(x, 0) = μ where p > 0, m > (1 - \frac{α}{n})^+ and μ is a finite Radon measure. We prove the uniqueness of solution and the existence of solution.