基本解释[数学]映射范数英汉例句双语例句By introducing weighted norm and using the Banach contraction mapping principle we obtain the existence of throughout positive solutions for the above equations.通过引进加权范数及利用巴拿赫压缩映射原理，得到上面这两种方程始终正解的存在性。mapping norm更多例句词组短语短语norm of mapping 映射的范数norm -mapping 模映射norm preserving mapping 保范映射mapping norm更多词组专业释义数学映射范数