代数幂级数收敛域的半代数性
Semialgebraicity of the convergence domain of an algebraic power series
AI总结:
本文研究实数子域上代数的有限多变量幂级数,证明其收敛域在子域实闭包上具有半代数性,并推出一元代数 Puiseux 级数的收敛半径属于实闭包或为无穷大。
摘要:
给定一个有限多变量幂级数,它在实数域的某个子域上关于相应多项式环是代数的,我们证明其收敛域在该子域的实闭包上是半代数的。这特别表明,在上述意义下为代数的一元 Puiseux 级数,其收敛半径属于该实闭包或为无穷大。
英文摘要:
Given a power series in finitely many variables that is algebraic over the corresponding polynomial ring over a subfield of the reals, we show that its convergence domain is semialgebraic over the real closure of the subfield. This gives in particular that the convergence radius of a univariate Puiseux series that is algebraic in the above sense belongs to the real closure or is infinity.
机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。