This book contains several contemporary topics in the areas of mathematical modelling and computation for complex systems. The readers find several new mathematical methods, mathematical models and computational techniques having significant relevance in studying various complex systems. The chapters aim to enrich the understanding of topics presented by carefully discussing the associated problems and issues, possible solutions and their applications or relevance in other scientific areas of study and research. The book  is a valuable resource for graduate students, researchers and educators in understanding and studying various new aspects associated with complex systems. Key Feature •  The chapters include theory and application in a mix and balanced way.• Readers find reasonable details of developments concerning a topic included in this book.• The text is emphasized to present in self-contained manner with inclusion ofnew research problems and questions.