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On Algebroid Solutions of Generalized Complex Differential Equations
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作者 高凌云 《Chinese Quarterly Journal of Mathematics》 CSCD 2001年第1期20-25,共6页
Using the Nevanlinna theory of the value distribution of meromorphic functions, we investigate the existence problem of admissible algebroid solutions of generalized complex algebraic differential equations and obtain... Using the Nevanlinna theory of the value distribution of meromorphic functions, we investigate the existence problem of admissible algebroid solutions of generalized complex algebraic differential equations and obtain some results. 展开更多
关键词 algebroid functions admissible solution generalized differential equations
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ON THE NEVANLINNA DIRECTION OF ALGEBROID FUNCTIONS
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作者 张洪申 孙道椿 《Acta Mathematica Scientia》 SCIE CSCD 2012年第4期1441-1448,共8页
In this paper, we prove that for an algebroid function w(z), the singular direction argz = φ0, satisfying that for arbitrary ε(0 〈 ε 〈 2/π) and any given α ∈ C^^,limr→+∞ log τ/n(τ,φ0-ε,φ0+ε,w=a... In this paper, we prove that for an algebroid function w(z), the singular direction argz = φ0, satisfying that for arbitrary ε(0 〈 ε 〈 2/π) and any given α ∈ C^^,limr→+∞ log τ/n(τ,φ0-ε,φ0+ε,w=a)=+∞ holds with at most; 2v possible exceptional values of a, is the Ncvanlinna direction of w(z). 展开更多
关键词 algebroid function Nevanlinna direction algebroid function Nevanlinna direction
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A Class of Lie 2-Algebras in Higher-Order Courant Algebroids
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作者 Yanhui Bi Fengying Han Meili Sun 《Journal of Applied Mathematics and Physics》 2016年第7期1254-1259,共6页
In this paper, we study the relation of the algebraic properties of the higher-order Courant bracket and Dorfman bracket on the direct sum bundle TM⊕∧<sup>p</sup>T*M for an m-dimensional smooth mani... In this paper, we study the relation of the algebraic properties of the higher-order Courant bracket and Dorfman bracket on the direct sum bundle TM⊕∧<sup>p</sup>T*M for an m-dimensional smooth manifold M, and a Lie 2-algebra which is a “categorified” version of a Lie algebra. We prove that the higher-order Courant algebroids give rise to a semistrict Lie 2-algebra, and we prove that the higher-order Dorfman algebroids give rise to a hemistrict Lie 2-algebra. Consequently, there is an isomorphism from the higher-order Courant algebroids to the higher-order Dorfman algebroids as Lie 2-algebras homomorphism. 展开更多
关键词 Higher-Order Courant algebroids Higher-Order Dorfman algebroids Lie 2-Algebra
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ON THE OPERATIONS OF ALGEBROID FUNCTIONS 被引量:10
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作者 孙道椿 高宗升 《Acta Mathematica Scientia》 SCIE CSCD 2010年第1期247-256,共10页
In this article, we first investigate the operational properties of algebroid functions. Then we prove two uniqueness theorems for algebroid functions.
关键词 algebroid function ADDITION MULTIPLICATION analytic image uniqueness theorem
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THE NORMALITY OF ALGEBROID MULTIFUNCTIONS AND THEIR COEFFICIENT FUNCTIONS 被引量:5
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作者 柴富杰 高宗升 《Acta Mathematica Scientia》 SCIE CSCD 2015年第1期121-132,共12页
In this paper, we investigate the normality relationship between algebroid multifunctions and their coefficient functions. We prove that the normality of a k-valued entire algebroid multifunctions family is equivalent... In this paper, we investigate the normality relationship between algebroid multifunctions and their coefficient functions. We prove that the normality of a k-valued entire algebroid multifunctions family is equivalent to their coefficient functions in some conditions. Furthermore, we obtain some new normality criteria for algebroid multifunctions families based on these results. We also provide some examples to expound that some restricted conditions of our main results are necessary. 展开更多
关键词 algebroid multifunctions normal families coefficient functions Hausdorff distance
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ALGEBROIDAL FUNCTION AND ITS DERIVED FUNCTION IN UNIT CIRCULAR DISC 被引量:4
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作者 霍颖莹 孙道椿 《Acta Mathematica Scientia》 SCIE CSCD 2009年第1期129-139,共11页
In this article,the authors define the derived function of an algeboidal function in the unit disc,prove it is an algabriodal function,and study the order of algebroidal function and that of its derived function in un... In this article,the authors define the derived function of an algeboidal function in the unit disc,prove it is an algabriodal function,and study the order of algebroidal function and that of its derived function in unit circular disc. 展开更多
关键词 algebroidal function derived function characteristic function
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NORMALITY CRITERIA FOR FAMILIES OF MEROMORPHIC ALGEBROID FUNCTIONS 被引量:3
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作者 孙道椿 《Acta Mathematica Scientia》 SCIE CSCD 2010年第1期166-172,共7页
By using the definition of Hausdorff distance, we prove some normality criteria for families of meromorphic algebroid functions. Some examples are given to complement the theory in this article.
关键词 Hausdorff distance meromorphic algebroid functions normality criteria
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BOREL RADIUS AND T-RADIUS OF THE ALGEBROIDAL FUNCTION IN THE UNIT DISC 被引量:2
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作者 孔荫蒙 《Acta Mathematica Scientia》 SCIE CSCD 2012年第5期1805-1812,共8页
Using Ahlfors’ theory of covering surface and a type-function,we confirm the existence theorem of a Borel radius and a T-radius for the algebroidal function dealing with multiple values in the unit disc,which briefly... Using Ahlfors’ theory of covering surface and a type-function,we confirm the existence theorem of a Borel radius and a T-radius for the algebroidal function dealing with multiple values in the unit disc,which briefly extend some results for the algebroidal functions in the complex plane 展开更多
关键词 algebroidal function Borel radius T-radius type-function
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ON THE C.CHANG TYPE INEQUALITY OF ALGEBROID FUNCTIONS 被引量:2
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作者 孙道椿 高宗升 《Acta Mathematica Scientia》 SCIE CSCD 2011年第3期835-842,共8页
In this paper,we investigate the growth relations between algebroid functions and their derivatives,and extend famous C.Chang inequality(see[1,4])of meromorphic functions to algebroid functions.
关键词 algebroid functions DERIVATIVE characteristic function
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THE BOREL DIRECTIONS OF ALGEBROIDAL FUNCTION AND ITS COEFFICIENT FUNCTIONS 被引量:2
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作者 张少华 张晓梅 孙道椿 《Acta Mathematica Scientia》 SCIE CSCD 2014年第2期241-251,共11页
In this article, the relationship between the Borel direction of algebroidal function and its coefficient functions is studied for the first time. To begin with, several theorems of algebroidal functions in unit disk ... In this article, the relationship between the Borel direction of algebroidal function and its coefficient functions is studied for the first time. To begin with, several theorems of algebroidal functions in unit disk are proved. By these theorems, some interesting conclusions are obtained. 展开更多
关键词 algebroidal function coefficient function Borel direction.
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Generalized Higher-Order Algebraic Differential Equations with Admissible Algebroid Solutions 被引量:4
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作者 高凌云 《Northeastern Mathematical Journal》 CSCD 2001年第2期159-168,共10页
Using the Nevanlinna theory of the value distribution of meromorphic functions, we investigate the existence problem of admissible algebroid solutions of generalized higher order algebraic differential equations.
关键词 algebroid functions admissible solution generalized higher order algebraic differential equations.
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ON THE SHARING VALUES OF ALGEBROID FUNCTIONS AND THEIR DERIVATIVES 被引量:1
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作者 刘惠芳 孙道椿 《Acta Mathematica Scientia》 SCIE CSCD 2013年第1期268-278,共11页
In this paper, we define the shared value of an algebroid function and its derivative on its Riemann surface. By considering the relationship between the shared values and the branch points of algebroid functions and ... In this paper, we define the shared value of an algebroid function and its derivative on its Riemann surface. By considering the relationship between the shared values and the branch points of algebroid functions and their derivatives, we obtain some uniqueness theorems of algebroid functions sharing values with their derivatives, which extend 3 IM shared values theorem of nonconstant meromorphic functions and their derivatives obtained by Mues-Steinmetz and Gundersen. 展开更多
关键词 algebroid function function element shared value UNIQUENESS
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ON UNIQUENESS FOR ALGEBROID FUNCTIONS OF FINITE ORDER 被引量:1
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作者 张平原 扈培础 《Acta Mathematica Scientia》 SCIE CSCD 2015年第3期630-638,共9页
Guided by Lo.Yang's method, we concern the question that how algebroid func- tions are determined by their multiple values and deficient values and we prove an at most 3v-valued theorem for algebroid functions. The r... Guided by Lo.Yang's method, we concern the question that how algebroid func- tions are determined by their multiple values and deficient values and we prove an at most 3v-valued theorem for algebroid functions. The results are complemented by an example for completeness. 展开更多
关键词 algebroid functions value distribution multiple values deficient values
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Uniqueness Theorem of Algebroidal Functions in the Unit Disc 被引量:1
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作者 刘慧芳 孙道椿 《Northeastern Mathematical Journal》 CSCD 2008年第6期511-520,共10页
In this paper, the uniqueness of algebroidal functions in the unit disc is investigated. Suppose that W(z) and M(z) are v-valued and k-valued algebroidal functions in the unit disc, respectively. Let e^iθ be a b-... In this paper, the uniqueness of algebroidal functions in the unit disc is investigated. Suppose that W(z) and M(z) are v-valued and k-valued algebroidal functions in the unit disc, respectively. Let e^iθ be a b-cluster point of order co or order ρ(x) of the algebroidal function W(z) or M(z). It is shown that if -↑E(aj, W(z)) = -↑E(aj,M(z)) holds in the domain {|z| 〈 1}∩Ω(θ-δ,θ+δ), where b, aj (j = 1,…, 2v + 2k + 1) are complex constants, then W(z) = M(z). The same results are obtained for the case that e^iθ is a Borel point of order co or order ρ(x) of the algebroidal function W(z) or M(z). 展开更多
关键词 algebroidal function order UNIQUENESS
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THE INTEGRATION OF ALGEBROIDAL FUNCTIONS
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作者 孙道椿 霍颖莹 +1 位作者 孔荫莹 柴富杰 《Acta Mathematica Scientia》 SCIE CSCD 2017年第6期1861-1869,共9页
In this paper, we introduce the integration of algebroidal functions on Riemann surfaces for the first time. Some properties of integration are obtained. By giving the defi- nition of residues and integral function el... In this paper, we introduce the integration of algebroidal functions on Riemann surfaces for the first time. Some properties of integration are obtained. By giving the defi- nition of residues and integral function element, we obtain the condition that the integral is independent of path. At last, we prove that the integral of an irreducible algebroidal function is also an irreducible algebroidal function if all the residues at critical points are zeros. 展开更多
关键词 algebroidal function INTEGRAL integral function element direct continuation
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GENERAL ALGEBROID FUNCTION AND ITS APPLICATION
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作者 孙道椿 霍颖莹 张晓梅 《Acta Mathematica Scientia》 SCIE CSCD 2016年第1期283-294,共12页
In this paper, the authors introduce a kind of reducible algebroid functions, that is general algebroid functions and obtain two fundamental theorems of general algebroid functions. At last, as an application, we gene... In this paper, the authors introduce a kind of reducible algebroid functions, that is general algebroid functions and obtain two fundamental theorems of general algebroid functions. At last, as an application, we generalized a theorem of Li Guoping's. 展开更多
关键词 general algebroid function the branch point theorem the first fundamentaltheorem the second fundamental theorem
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SEVERAL UNIQUENESS THEOREMS OF ALGEBROID FUNCTIONS ON ANNULI
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作者 谭洋 《Acta Mathematica Scientia》 SCIE CSCD 2016年第1期295-316,共22页
In this paper, we discuss the uniqueness problem of algebroid functions on annull, we get several uniqueness theorems of algebroid functions on annuli, which extend the Nevanlinna value distribution theory for algebro... In this paper, we discuss the uniqueness problem of algebroid functions on annull, we get several uniqueness theorems of algebroid functions on annuli, which extend the Nevanlinna value distribution theory for algebroid functions on annuli. 展开更多
关键词 the Nevanlinna theory multiple values the uniqueness of algebroid functionson annuli
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THE UNIQUENESS FOR ALGEBROID FUNCTIONS OF FINITE ORDER
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作者 Yang TAN Yinying KONG 《Acta Mathematica Scientia》 SCIE CSCD 2020年第4期981-990,共10页
In this article,we discuss,by Nevanlinna theory,the influence of multiple values and deficiencies on the uniqueness problem of algebroid functions.We get several uniqueness theorems of algebroid functions which includ... In this article,we discuss,by Nevanlinna theory,the influence of multiple values and deficiencies on the uniqueness problem of algebroid functions.We get several uniqueness theorems of algebroid functions which include an at most 3v-valued theorem.These results extend the existing achievements of some scholars. 展开更多
关键词 multiple values DEFICIENCIES order UNIQUENESS algebroid functions
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Uniqueness Theorem of Algebroidal Function in the Unit Disc
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作者 ZHANG Xiao-mei SUN Dao-chun 《Chinese Quarterly Journal of Mathematics》 CSCD 2012年第3期357-363,共7页
In this paper, discussed are the problems about uniqueness of algebroidal functions in the unit disc with share-values in a sector domain instead of the whole disk. Results are obtained extending some uniqueness theor... In this paper, discussed are the problems about uniqueness of algebroidal functions in the unit disc with share-values in a sector domain instead of the whole disk. Results are obtained extending some uniqueness theorems of meromorphic functions. 展开更多
关键词 algebroidal function UNIQUENESS unit disk
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THE GROWTH AND BOREL POINTS OF RANDOM ALGEBROID FUNCTIONS IN THE UNIT DISC
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作者 Daochun SUN Yingying HUO Fujie CHAI 《Acta Mathematica Scientia》 SCIE CSCD 2021年第4期1119-1129,共11页
In this paper,we construct k-valued random analytic algebroid functions for the first time.By combining the properties of random series,we study the growth and Bor el points of random analytic algebroid functions in t... In this paper,we construct k-valued random analytic algebroid functions for the first time.By combining the properties of random series,we study the growth and Bor el points of random analytic algebroid functions in the unit disc and obtain some interesting theorems. 展开更多
关键词 Sequence of random variables algebroid functions GROWTH Borel points
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