A:《數學與理論》是一份主要的理論物理報告研究期刊，研究描述物理世界基本過程的數學結構，以及探索這些結構的分析、計算和數值方法。發表在《物理學報A:數學與理論》(JPA)上的研究論文被分為以下定義的七個主題部分之一。為了能夠在期刊上發表，論文必須對這些部分中的一個或多個主題做出重要的、原創的和正確的貢獻。數學論文應該清楚地由物理現象的實際或潛在的應用來激發。統計物理:非平衡系統，計算方法和現代平衡理論混沌復雜系統生物模型數學物理量子力學和量子信息論場理論和弦理論流體與等離子體理論

Journal of Physics A: Mathematical and Theoretical is a major journal of theoretical physics reporting research on the mathematical structures that describe fundamental processes of the physical world and on the analytical, computational and numerical methods for exploring these structures.Research papers published in Journal of Physics A: Mathematical and Theoretical (JPA) are categorised into one of seven subject sections, defined below. To be acceptable for publication in the journal, papers must make significant, original and correct contributions to one or more of the topics within these sections.Mathematical papers should be clearly motivated by actual or potential application to physical phenomena.Statistical physics: nonequilibrium systems, computational methods and modern equilibrium theoryChaotic and complex systemsBiological modellingMathematical physicsQuantum mechanics and quantum information theoryField theory and string theoryFluid and plasma theory