Dwivedi, GauravGauravDwivedi2025-09-042025-09-042014-09-0110.7153/dea-06-29https://d8.irins.org/handle/IITG2025/29612In this article we deal with the existence questions to the nonlinear biharmonic systems. Using theory of monotone operators, we show the existence of a unique weak solution to the weighted biharmonic systems. We also show the existence of a positive solution to weighted biharmonic systems in the unit ball in Rn, using Leray Schauder fixed point theorem. In this study we allow sign-changing weights.en-USBiharmonic systemWeightsArticlehttp://files.ele-math.com/abstracts/dea-06-29-abs.pdfpp.495-516Article0123456789/572