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Ukrainian Mathematical Journal最新文献

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The Concept of Topological Well-Ordered Space 拓扑良序空间的概念
4区 数学 Q3 MATHEMATICS
Ukrainian Mathematical Journal
Pub Date : 2023-11-10 DOI: 10.1007/s11253-023-02238-y
Mustafa Burç Kandemir, Dilan Başak Uludağ
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引用次数: 0
Complex Hessian-Type Equations in the Weighted m-Subharmonic Class 加权m-次谐波类中的复hessian型方程
4区 数学 Q3 MATHEMATICS
Ukrainian Mathematical Journal
Pub Date : 2023-11-10 DOI: 10.1007/s11253-023-02237-z
Mohamed Zaway, Jawhar Hbil
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引用次数: 1
Periodic and Weakly Periodic Ground States Corresponding to the Subgroups of Index Three for the Ising Model on the Cayley Tree of Order Three 三阶Cayley树上Ising模型对应于指标三子群的周期和弱周期基态
4区 数学 Q3 MATHEMATICS
Ukrainian Mathematical Journal
Pub Date : 2023-11-09 DOI: 10.1007/s11253-023-02236-0
Dilshod O. Egamov
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引用次数: 0
Finite A2-Continued Fractions in the Problems of Rational Approximations of Real Numbers 实数的有理逼近问题中的有限a2连分式
4区 数学 Q3 MATHEMATICS
Ukrainian Mathematical Journal
Pub Date : 2023-11-09 DOI: 10.1007/s11253-023-02241-3
M. Pratsiovytyi, Ya. Goncharenko, I. Lysenko, S. Ratushnyak
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引用次数: 0
Quaternionic Davis–Wielandt Shell in a Right Quaternionic Hilbert Space 右四元Hilbert空间中的四元Davis-Wielandt壳
4区 数学 Q3 MATHEMATICS
Ukrainian Mathematical Journal
Pub Date : 2023-11-09 DOI: 10.1007/s11253-023-02235-1
Aref Jeribi, Kamel Mahfoudhi
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引用次数: 0
Multiple Solutions to Boundary-Value Problems for Fourth-Order Elliptic Equations 四阶椭圆方程边值问题的多重解
4区 数学 Q3 MATHEMATICS
Ukrainian Mathematical Journal
Pub Date : 2023-11-09 DOI: 10.1007/s11253-023-02239-x
Duong Trong Luyen, Mai Thi Thu Trang
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引用次数: 0
The Forcing Metric Dimension of a Total Graph of Nonzero Annihilating Ideals 非零湮灭理想全图的强迫度量维数
4区 数学 Q3 MATHEMATICS
Ukrainian Mathematical Journal
Pub Date : 2023-11-08 DOI: 10.1007/s11253-023-02240-4
M. Pazoki
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引用次数: 0
More on Stability of Two Functional Equations 再谈两个泛函方程的稳定性
4区 数学 Q3 MATHEMATICS
Ukrainian Mathematical Journal
Pub Date : 2023-11-08 DOI: 10.1007/s11253-023-02242-2
Longfa Sun, Yunbai Dong
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引用次数: 0
Asymmetric Catalytic Hydroboration of Enol Carbamates Enables an Enantioselective Matteson Homologation. 烯醇氨基甲酸酯的不对称催化氢硼化使不对称选择性马特森同源反应成为可能。
IF 1.7 4区 数学 Q3 MATHEMATICS
Ukrainian Mathematical Journal
Pub Date : 2023-11-01 Epub Date: 2023-05-06 DOI: 10.1055/a-2106-1461
Dmitry M Kuznetsov, Joseph M Ready

Rh-catalyzed asymmetric hydroboration of enol carbamates yields α-boryl carbamates in good enantioselectivity. The enol carbamate starting materials can be prepared with moderate Z selectivity using a modified Juila olefination and used as an E/Z mixture, taking advantage of the faster reactivity of the major Z isomer in the directed hydroboration. Optically active α-boryl carbamates participate in a Matteson-type homologation with Grignard reagents in which the O-carbamate is substituted with high conservation of optical activity to provide enantioenriched secondary boronic esters.

在 Rh 催化下，烯醇氨基甲酸酯发生不对称氢硼化反应，以良好的对映选择性生成 α-硼基氨基甲酸酯。利用定向硼化反应中主要 Z 异构体反应速度较快的优势，烯醇氨基甲酸酯起始材料可通过改良的朱拉烯化反应以中等的 Z 选择性制备，并用作 E/Z 混合物。具有光学活性的 α-硼基氨基甲酸酯与格氏试剂发生马特松型同源反应，其中 O-氨基甲酸酯被取代，并保持较高的光学活性，从而提供对映体富集的仲硼酸酯。
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引用次数: 0
Local Distance Antimagic Chromatic Number for the Union of Star and Double Star Graphs 星图与双星图并的局部距离反幻色数
4区 数学 Q3 MATHEMATICS
Ukrainian Mathematical Journal
Pub Date : 2023-10-31 DOI: 10.1007/s11253-023-02227-1
V. Priyadharshini, M. Nalliah
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引用次数: 0
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