本征值是（实验中）能测得出来的量，与之对应在量子力学理论中，很多量并不能得以测量，当然，其他理论领域也有这一现象。举量子力学以加说明。
n. eigenvalue
misc. proper value
The fundamental problems are boiled to zero eigenvalue solutions and all their Jordan normal form and non-zero eigenvalue solutions.
将问题归结为零本征值本征解和非零本征值本征解问题。
参考来源 - 粘弹性柱体问题的对偶体系研究The eigenvalue problems are also very important in electromagneticfields, in which the waveguide problems and the syntonic problems of cavity are the typical ones being discussed.
电磁场的本征值问题是电磁场中的另一大类问题，常见的有波导和腔体的谐振问题。
参考来源 - 二维电磁场的有限元计算·2,447,543篇论文数据，部分数据来源于NoteExpress
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