标题： 标量—轴子引力中的隐藏对称性 显示英文标题

标题： Hidden Symmerties in Dilaton--Axion Gravity

摘要： 限制在具有一个非零 Killing 对称性的时空上的四维爱因斯坦-麦克斯韦-标量-轴子系统被表述为三维引力耦合 sigma 模型。 讨论了几种替代表示形式，并揭示了相关的隐藏对称性。 发现目标空间等距作用于初始（未对偶化）变量集上的作用。 通过基于非对偶化变量的表述形式，利用生成技术获得了新的多中心解。 显示英文摘要

摘要： Four--dimensional Einstein--Maxwell--dilaton--axion system restricted to space--times with one non--null Killing symmetry is formulated as the three--dimensional gravity coupled sigma--model. Several alternative representations are discussed and the associated hidden symmetries are revealed. The action of target space isometries on the initial set of (non--dualized ) variables is found. New mulicenter solutions are obtained via generating technique based on the formulation in terms of the non--dualized variables.