... quaternion 四元数 quaternionic四元的 queen post truss 双桩屋架，双柱桁架 ...
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?四元素
...其中 p=( ,u),q=( ,v) H λ μ ∈ ， u v ? 和u v × 分别表示u与v的内积和外积． 用 H n H 表示n维的四元素（Quaternionic）Heisenberg群 定义乘法法则如下 n p p p=1 (u,v)(w,t)=(u+w,v+t+2 Im(w u )), ∑ ...
The main spectrums, singular spectrums and cospectrums of matrices over quaternionic sfield are studied.
研究四元数矩阵的主谱、协谱和奇异谱的性质。
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In recent 30 years, many experts and scholars were carrying on an extensive research about quaternionic matrix and got plenteous theoretical results.
近30年来，许多专家学者对四元数矩阵进行了广泛的研究，取得了丰硕的理论成果。
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One kind of inverse eigenvalue problems, whose solutions are required to be normal or diagonalizable matrices, is investigated in quaternionic quantum mechanics.